diff --git a/class.jetpack-user-agent.php b/class.jetpack-user-agent.php
index cbf7a21ea0721..eabb17881567d 100644
--- a/class.jetpack-user-agent.php
+++ b/class.jetpack-user-agent.php
@@ -1,207 +1,40 @@
 <?php
-
 /**
- * Determine if the current User Agent matches the passed $kind
+ * Deprecated. Use Automattic\Jetpack\Device_Detection\User_Agent_Info instead.
  *
- * @param string $kind Category of mobile device to check for.
- *                         Either: any, dumb, smart.
- * @param bool   $return_matched_agent Boolean indicating if the UA should be returned
+ * @package Jetpack
  *
- * @return bool|string Boolean indicating if current UA matches $kind. If
- *                              $return_matched_agent is true, returns the UA string
+ * @phpcs:disable WordPress.NamingConventions.ValidVariableName.UsedPropertyNotSnakeCase
+ * @phpcs:disable WordPress.NamingConventions.ValidVariableName.VariableNotSnakeCase
+ * @phpcs:disable WordPress.NamingConventions.ValidVariableName.PropertyNotSnakeCase
+ * @phpcs:disable WordPress.NamingConventions.ValidFunctionName.MethodNameInvalid
+ * @phpcs:disable WordPress.Files.FileName
  */
-function jetpack_is_mobile( $kind = 'any', $return_matched_agent = false ) {
-	static $kinds         = array(
-		'smart' => false,
-		'dumb'  => false,
-		'any'   => false,
-	);
-	static $first_run     = true;
-	static $matched_agent = '';
-
-	// If an invalid kind is passed in, reset it to default.
-	if ( ! isset( $kinds[ $kind ] ) ) {
-			$kind = 'any';
-	}
-
-	if ( function_exists( 'apply_filters' ) ) {
-		/**
-		 * Filter the value of jetpack_is_mobile before it is calculated.
-		 *
-		 * Passing a truthy value to the filter will short-circuit determining the
-		 * mobile type, returning the passed value instead.
-		 *
-		 * @since  4.2.0
-		 *
-		 * @param bool|string $matches Boolean if current UA matches $kind or not. If
-		 *                             $return_matched_agent is true, should return the UA string
-		 * @param string      $kind Category of mobile device being checked
-		 * @param bool        $return_matched_agent Boolean indicating if the UA should be returned
-		 */
-		$pre = apply_filters( 'pre_jetpack_is_mobile', null, $kind, $return_matched_agent );
-
-		if ( null !== $pre ) {
-			return $pre;
-		}
-	}
-
-	$ua_info = new Jetpack_User_Agent_Info();
-
-	if ( empty( $_SERVER['HTTP_USER_AGENT'] ) || strpos( strtolower( $_SERVER['HTTP_USER_AGENT'] ), 'ipad' ) ) {
-		return false;
-	}
-
-	// Remove Samsung Galaxy tablets (SCH-I800) from being mobile devices
-	if ( strpos( strtolower( $_SERVER['HTTP_USER_AGENT'] ), 'sch-i800' ) ) {
-		return false;
-	}
-
-	if ( $ua_info->is_android_tablet() && false === $ua_info->is_kindle_touch() ) {
-		return false;
-	}
-
-	if ( $ua_info->is_blackberry_tablet() ) {
-		return false;
-	}
-
-	if ( $first_run ) {
-		$first_run = false;
 
-		// checks for iPhoneTier devices & RichCSS devices
-		if ( $ua_info->isTierIphone() || $ua_info->isTierRichCSS() ) {
-			$kinds['smart'] = true;
-			$matched_agent  = $ua_info->matched_agent;
-		}
-
-		if ( ! $kinds['smart'] ) {
-			// if smart, we are not dumb so no need to check
-			$dumb_agents = $ua_info->dumb_agents;
-			$agent       = strtolower( $_SERVER['HTTP_USER_AGENT'] );
-
-			foreach ( $dumb_agents as $dumb_agent ) {
-				if ( false !== strpos( $agent, $dumb_agent ) ) {
-					$kinds['dumb'] = true;
-					$matched_agent = $dumb_agent;
-
-					break;
-				}
-			}
-
-			if ( ! $kinds['dumb'] ) {
-				if ( isset( $_SERVER['HTTP_X_WAP_PROFILE'] ) ) {
-					$kinds['dumb'] = true;
-					$matched_agent = 'http_x_wap_profile';
-				} elseif ( isset( $_SERVER['HTTP_ACCEPT'] ) && ( preg_match( '/wap\.|\.wap/i', $_SERVER['HTTP_ACCEPT'] ) || false !== strpos( strtolower( $_SERVER['HTTP_ACCEPT'] ), 'application/vnd.wap.xhtml+xml' ) ) ) {
-					$kinds['dumb'] = true;
-					$matched_agent = 'vnd.wap.xhtml+xml';
-				}
-			}
-		}
-
-		if ( $kinds['dumb'] || $kinds['smart'] ) {
-			$kinds['any'] = true;
-		}
-	}
-
-	$value = $kinds[ $kind ];
-
-	if ( $return_matched_agent ) {
-		$value = $matched_agent;
-	}
-
-	if ( function_exists( 'apply_filters' ) ) {
-		/**
-		 * Filter the value of jetpack_is_mobile
-		 *
-		 * @since  4.2.0
-		 *
-		 * @param bool|string $matches Boolean if current UA matches $kind or not. If
-		 *                             $return_matched_agent is true, should return the UA string
-		 * @param string      $kind Category of mobile device being checked
-		 * @param bool        $return_matched_agent Boolean indicating if the UA should be returned
-		 */
-		$value = apply_filters( 'jetpack_is_mobile', $value, $kind, $return_matched_agent );
-	}
-
-	return $value;
-}
+use \Automattic\Jetpack\Device_Detection\User_Agent_Info;
 
+/**
+ * A class providing device properties detection.
+ *
+ * Deprecated. Use Automattic\Jetpack\Device_Detection\User_Agent_Info instead.
+ */
 class Jetpack_User_Agent_Info {
 
-	public $useragent;
-	public $matched_agent;
-	public $isTierIphone; // Stores whether is the iPhone tier of devices.
-	public $isTierRichCss; // Stores whether the device can probably support Rich CSS, but JavaScript (jQuery) support is not assumed.
-	public $isTierGenericMobile; // Stores whether it is another mobile device, which cannot be assumed to support CSS or JS (eg, older BlackBerry, RAZR)
-
-	private $_platform            = null; // Stores the device platform name
-	const PLATFORM_WINDOWS        = 'windows';
-	const PLATFORM_IPHONE         = 'iphone';
-	const PLATFORM_IPOD           = 'ipod';
-	const PLATFORM_IPAD           = 'ipad';
-	const PLATFORM_BLACKBERRY     = 'blackberry';
-	const PLATFORM_BLACKBERRY_10  = 'blackberry_10';
-	const PLATFORM_SYMBIAN        = 'symbian_series60';
-	const PLATFORM_SYMBIAN_S40    = 'symbian_series40';
-	const PLATFORM_J2ME_MIDP      = 'j2me_midp';
-	const PLATFORM_ANDROID        = 'android';
-	const PLATFORM_ANDROID_TABLET = 'android_tablet';
-	const PLATFORM_FIREFOX_OS     = 'firefoxOS';
-
-	public $dumb_agents = array(
-		'nokia',
-		'blackberry',
-		'philips',
-		'samsung',
-		'sanyo',
-		'sony',
-		'panasonic',
-		'webos',
-		'ericsson',
-		'alcatel',
-		'palm',
-		'windows ce',
-		'opera mini',
-		'series60',
-		'series40',
-		'au-mic,',
-		'audiovox',
-		'avantgo',
-		'blazer',
-		'danger',
-		'docomo',
-		'epoc',
-		'ericy',
-		'i-mode',
-		'ipaq',
-		'midp-',
-		'mot-',
-		'netfront',
-		'nitro',
-		'palmsource',
-		'pocketpc',
-		'portalmmm',
-		'rover',
-		'sie-',
-		'symbian',
-		'cldc-',
-		'j2me',
-		'smartphone',
-		'up.browser',
-		'up.link',
-		'up.link',
-		'vodafone/',
-		'wap1.',
-		'wap2.',
-		'mobile',
-		'googlebot-mobile',
-	);
+	/**
+	 * User_Agent_Info instance from the `jetpack-device-detection` package.
+	 *
+	 * @var User_Agent_Info
+	 */
+	private $ua_info;
 
-	// The constructor. Initializes default variables.
-	function __construct() {
-		if ( ! empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
-			$this->useragent = strtolower( $_SERVER['HTTP_USER_AGENT'] );
-		}
+	/**
+	 * The constructor.
+	 *
+	 * @param string $ua (Optional) User agent.
+	 */
+	public function __construct( $ua = '' ) {
+		_deprecated_function( __METHOD__, 'Jetpack 8.7', '\Automattic\Jetpack\Device_Detection\User_Agent_Info from the `automattic/jetpack-device-detection` package' );
+		$this->ua_info = new User_Agent_Info( $ua );
 	}
 
 	/**
@@ -209,76 +42,9 @@ function __construct() {
 	 *
 	 * @return string The matched User Agent name, false otherwise.
 	 */
-	function get_mobile_user_agent_name() {
-		if ( $this->is_chrome_for_iOS() ) { // keep this check before the safari rule
-			return 'chrome-for-ios';
-		} elseif ( $this->is_iphone_or_ipod( 'iphone-safari' ) ) {
-			return 'iphone';
-		} elseif ( $this->is_ipad( 'ipad-safari' ) ) {
-			return 'ipad';
-		} elseif ( $this->is_android_tablet() ) { // keep this check before the android rule
-			return 'android_tablet';
-		} elseif ( $this->is_android() ) {
-			return 'android';
-		} elseif ( $this->is_blackberry_10() ) {
-			return 'blackberry_10';
-		} elseif ( $this->is_blackbeberry() ) {
-			return 'blackberry';
-		} elseif ( $this->is_WindowsPhone7() ) {
-			return 'win7';
-		} elseif ( $this->is_windows_phone_8() ) {
-			return 'winphone8';
-		} elseif ( $this->is_opera_mini() ) {
-			return 'opera-mini';
-		} elseif ( $this->is_opera_mini_dumb() ) {
-			return 'opera-mini-dumb';
-		} elseif ( $this->is_opera_mobile() ) {
-			return 'opera-mobi';
-		} elseif ( $this->is_blackberry_tablet() ) {
-			return 'blackberry_tablet';
-		} elseif ( $this->is_kindle_fire() ) {
-			return 'kindle-fire';
-		} elseif ( $this->is_PalmWebOS() ) {
-			return 'webos';
-		} elseif ( $this->is_S60_OSSBrowser() ) {
-			return 'series60';
-		} elseif ( $this->is_firefox_os() ) {
-			return 'firefoxOS';
-		} elseif ( $this->is_firefox_mobile() ) {
-			return 'firefox_mobile';
-		} elseif ( $this->is_MaemoTablet() ) {
-			return 'maemo';
-		} elseif ( $this->is_MeeGo() ) {
-			return 'meego';
-		} elseif ( $this->is_TouchPad() ) {
-			return 'hp_tablet';
-		} elseif ( $this->is_facebook_for_iphone() ) {
-			return 'facebook-for-iphone';
-		} elseif ( $this->is_facebook_for_ipad() ) {
-			return 'facebook-for-ipad';
-		} elseif ( $this->is_twitter_for_iphone() ) {
-			return 'twitter-for-iphone';
-		} elseif ( $this->is_twitter_for_ipad() ) {
-			return 'twitter-for-ipad';
-		} elseif ( $this->is_wordpress_for_ios() ) {
-			return 'ios-app';
-		} elseif ( $this->is_iphone_or_ipod( 'iphone-not-safari' ) ) {
-			return 'iphone-unknown';
-		} elseif ( $this->is_ipad( 'ipad-not-safari' ) ) {
-			return 'ipad-unknown';
-		} elseif ( $this->is_Nintendo_3DS() ) {
-			return 'nintendo-3ds';
-		} else {
-			$agent       = strtolower( $_SERVER['HTTP_USER_AGENT'] );
-			$dumb_agents = $this->dumb_agents;
-			foreach ( $dumb_agents as $dumb_agent ) {
-				if ( false !== strpos( $agent, $dumb_agent ) ) {
-					return $dumb_agent;
-				}
-			}
-		}
-
-		return false;
+	public function get_mobile_user_agent_name() {
+		_deprecated_function( __METHOD__, 'Jetpack 8.7', '\Automattic\Jetpack\Device_Detection\User_Agent_Info->get_mobile_user_agent_name from the `automattic/jetpack-device-detection` package' );
+		return $this->ua_info->get_mobile_user_agent_name();
 	}
 
 	/**
@@ -289,223 +55,52 @@ function get_mobile_user_agent_name() {
 	 * @return string Name of the platform, false otherwise.
 	 */
 	public function get_platform() {
-		if ( isset( $this->_platform ) ) {
-			  return $this->_platform;
-		}
-
-		if ( strpos( $this->useragent, 'windows phone' ) !== false ) {
-			 $this->_platform = self::PLATFORM_WINDOWS;
-		} elseif ( strpos( $this->useragent, 'windows ce' ) !== false ) {
-			$this->_platform = self::PLATFORM_WINDOWS;
-		} elseif ( strpos( $this->useragent, 'ipad' ) !== false ) {
-			$this->_platform = self::PLATFORM_IPAD;
-		} elseif ( strpos( $this->useragent, 'ipod' ) !== false ) {
-			$this->_platform = self::PLATFORM_IPOD;
-		} elseif ( strpos( $this->useragent, 'iphone' ) !== false ) {
-			$this->_platform = self::PLATFORM_IPHONE;
-		} elseif ( strpos( $this->useragent, 'android' ) !== false ) {
-			if ( $this->is_android_tablet() ) {
-				$this->_platform = self::PLATFORM_ANDROID_TABLET;
-			} else {
-				$this->_platform = self::PLATFORM_ANDROID;
-			}
-		} elseif ( $this->is_kindle_fire() ) {
-			$this->_platform = self::PLATFORM_ANDROID_TABLET;
-		} elseif ( $this->is_blackberry_10() ) {
-			$this->_platform = self::PLATFORM_BLACKBERRY_10;
-		} elseif ( strpos( $this->useragent, 'blackberry' ) !== false ) {
-			$this->_platform = self::PLATFORM_BLACKBERRY;
-		} elseif ( $this->is_blackberry_tablet() ) {
-			$this->_platform = self::PLATFORM_BLACKBERRY;
-		} elseif ( $this->is_symbian_platform() ) {
-			$this->_platform = self::PLATFORM_SYMBIAN;
-		} elseif ( $this->is_symbian_s40_platform() ) {
-			$this->_platform = self::PLATFORM_SYMBIAN_S40;
-		} elseif ( $this->is_J2ME_platform() ) {
-			$this->_platform = self::PLATFORM_J2ME_MIDP;
-		} elseif ( $this->is_firefox_os() ) {
-			$this->_platform = self::PLATFORM_FIREFOX_OS;
-		} else {
-			$this->_platform = false;
-		}
-
-		return $this->_platform;
+		_deprecated_function( __METHOD__, 'Jetpack 8.7', '\Automattic\Jetpack\Device_Detection\User_Agent_Info->get_platform from the `automattic/jetpack-device-detection` package' );
+		return $this->ua_info->get_platform();
 	}
 
-	/*
+	/**
 	 * This method detects for UA which can display iPhone-optimized web content.
 	 * Includes iPhone, iPod Touch, Android, WebOS, Fennec (Firefox mobile), etc.
-	 *
 	 */
-	function isTierIphone() {
-		if ( isset( $this->isTierIphone ) ) {
-			return $this->isTierIphone;
-		}
-		if ( $this->is_iphoneOrIpod() ) {
-			$this->matched_agent       = 'iphone';
-			$this->isTierIphone        = true;
-			$this->isTierRichCss       = false;
-			$this->isTierGenericMobile = false;
-		} elseif ( $this->is_android() ) {
-			$this->matched_agent       = 'android';
-			$this->isTierIphone        = true;
-			$this->isTierRichCss       = false;
-			$this->isTierGenericMobile = false;
-		} elseif ( $this->is_windows_phone_8() ) {
-			$this->matched_agent       = 'winphone8';
-			$this->isTierIphone        = true;
-			$this->isTierRichCss       = false;
-			$this->isTierGenericMobile = false;
-		} elseif ( $this->is_WindowsPhone7() ) {
-			$this->matched_agent       = 'win7';
-			$this->isTierIphone        = true;
-			$this->isTierRichCss       = false;
-			$this->isTierGenericMobile = false;
-		} elseif ( $this->is_blackberry_10() ) {
-			$this->matched_agent       = 'blackberry-10';
-			$this->isTierIphone        = true;
-			$this->isTierRichCss       = false;
-			$this->isTierGenericMobile = false;
-		} elseif ( $this->is_blackbeberry() && $this->detect_blackberry_browser_version() == 'blackberry-webkit' ) {
-			$this->matched_agent       = 'blackberry-webkit';
-			$this->isTierIphone        = true;
-			$this->isTierRichCss       = false;
-			$this->isTierGenericMobile = false;
-		} elseif ( $this->is_blackberry_tablet() ) {
-			$this->matched_agent       = 'blackberry_tablet';
-			$this->isTierIphone        = true;
-			$this->isTierRichCss       = false;
-			$this->isTierGenericMobile = false;
-		} elseif ( $this->is_PalmWebOS() ) {
-			$this->matched_agent       = 'webos';
-			$this->isTierIphone        = true;
-			$this->isTierRichCss       = false;
-			$this->isTierGenericMobile = false;
-		} elseif ( $this->is_TouchPad() ) {
-			$this->matched_agent       = 'hp_tablet';
-			$this->isTierIphone        = true;
-			$this->isTierRichCss       = false;
-			$this->isTierGenericMobile = false;
-		} elseif ( $this->is_firefox_os() ) {
-			$this->matched_agent       = 'firefoxOS';
-			$this->isTierIphone        = true;
-			$this->isTierRichCss       = false;
-			$this->isTierGenericMobile = false;
-		} elseif ( $this->is_firefox_mobile() ) {
-			$this->matched_agent       = 'fennec';
-			$this->isTierIphone        = true;
-			$this->isTierRichCss       = false;
-			$this->isTierGenericMobile = false;
-		} elseif ( $this->is_opera_mobile() ) {
-			$this->matched_agent       = 'opera-mobi';
-			$this->isTierIphone        = true;
-			$this->isTierRichCss       = false;
-			$this->isTierGenericMobile = false;
-		} elseif ( $this->is_MaemoTablet() ) {
-			$this->matched_agent       = 'maemo';
-			$this->isTierIphone        = true;
-			$this->isTierRichCss       = false;
-			$this->isTierGenericMobile = false;
-		} elseif ( $this->is_MeeGo() ) {
-			$this->matched_agent       = 'meego';
-			$this->isTierIphone        = true;
-			$this->isTierRichCss       = false;
-			$this->isTierGenericMobile = false;
-		} elseif ( $this->is_kindle_touch() ) {
-			$this->matched_agent       = 'kindle-touch';
-			$this->isTierIphone        = true;
-			$this->isTierRichCss       = false;
-			$this->isTierGenericMobile = false;
-		} elseif ( $this->is_Nintendo_3DS() ) {
-			$this->matched_agent       = 'nintendo-3ds';
-			$this->isTierIphone        = true;
-			$this->isTierRichCss       = false;
-			$this->isTierGenericMobile = false;
-		} else {
-			$this->isTierIphone = false;
-		}
-		return $this->isTierIphone;
+	public function isTierIphone() {
+		_deprecated_function( __METHOD__, 'Jetpack 8.7', '\Automattic\Jetpack\Device_Detection\User_Agent_Info->isTierIphone from the `automattic/jetpack-device-detection` package' );
+		return $this->ua_info->isTierIphone();
 	}
 
-	/*
+	/**
 	 * This method detects for UA which are likely to be capable
 	 * but may not necessarily support JavaScript.
 	 * Excludes all iPhone Tier UA.
-	 *
 	 */
-	function isTierRichCss() {
-		if ( isset( $this->isTierRichCss ) ) {
-			return $this->isTierRichCss;
-		}
-		if ( $this->isTierIphone() ) {
-			return false;
-		}
-
-		// The following devices are explicitly ok.
-		if ( $this->is_S60_OSSBrowser() ) {
-			$this->matched_agent       = 'series60';
-			$this->isTierIphone        = false;
-			$this->isTierRichCss       = true;
-			$this->isTierGenericMobile = false;
-		} elseif ( $this->is_opera_mini() ) {
-			$this->matched_agent       = 'opera-mini';
-			$this->isTierIphone        = false;
-			$this->isTierRichCss       = true;
-			$this->isTierGenericMobile = false;
-		} elseif ( $this->is_blackbeberry() ) {
-			$detectedDevice = $this->detect_blackberry_browser_version();
-			if ( $detectedDevice === 'blackberry-5' || $detectedDevice == 'blackberry-4.7' || $detectedDevice === 'blackberry-4.6' ) {
-				$this->matched_agent       = $detectedDevice;
-				$this->isTierIphone        = false;
-				$this->isTierRichCss       = true;
-				$this->isTierGenericMobile = false;
-			}
-		} else {
-			$this->isTierRichCss = false;
-		}
-
-		return $this->isTierRichCss;
+	public function isTierRichCss() {
+		_deprecated_function( __METHOD__, 'Jetpack 8.7', '\Automattic\Jetpack\Device_Detection\User_Agent_Info->isTierRichCss from the `automattic/jetpack-device-detection` package' );
+		return $this->ua_info->isTierRichCss();
 	}
 
-	// Detects if the user is using a tablet.
-	// props Corey Gilmore, BGR.com
-	static function is_tablet() {
-		return ( 0 // never true, but makes it easier to manage our list of tablet conditions
-				|| self::is_ipad()
-				|| self::is_android_tablet()
-				|| self::is_blackberry_tablet()
-				|| self::is_kindle_fire()
-				|| self::is_MaemoTablet()
-				|| self::is_TouchPad()
-		);
+	/**
+	 * Detects if the user is using a tablet.
+	 * props Corey Gilmore, BGR.com
+	 *
+	 * @return bool
+	 */
+	public function is_tablet() {
+		_deprecated_function( __METHOD__, 'Jetpack 8.7', '\Automattic\Jetpack\Device_Detection\User_Agent_Info->is_tablet from the `automattic/jetpack-device-detection` package' );
+		return $this->ua_info->is_tablet();
 	}
 
-	/*
+	/**
 	 *  Detects if the current UA is the default iPhone or iPod Touch Browser.
 	 *
 	 *  DEPRECATED: use is_iphone_or_ipod
-	 *
 	 */
-	static function is_iphoneOrIpod() {
-
-		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
-			return false;
-		}
-
-		$ua = strtolower( $_SERVER['HTTP_USER_AGENT'] );
-		if ( ( strpos( $ua, 'iphone' ) !== false ) || ( strpos( $ua, 'ipod' ) !== false ) ) {
-			if ( self::is_opera_mini() || self::is_opera_mobile() || self::is_firefox_mobile() ) {
-				return false;
-			} else {
-				return true;
-			}
-		} else {
-			return false;
-		}
+	public function is_iphoneOrIpod() {
+		_deprecated_function( __METHOD__, 'Jetpack 8.7', '\Automattic\Jetpack\Device_Detection\User_Agent_Info->is_iphone_or_ipod from the `automattic/jetpack-device-detection` package' );
+		return $this->ua_info->is_iphoneOrIpod();
 	}
 
 
-	/*
+	/**
 	 *  Detects if the current UA is iPhone Mobile Safari or another iPhone or iPod Touch Browser.
 	 *
 	 *  They type can check for any iPhone, an iPhone using Safari, or an iPhone using something other than Safari.
@@ -514,170 +109,77 @@ static function is_iphoneOrIpod() {
 	 *  you should put the check condition before the check for 'iphone-any' or 'iphone-not-safari'.
 	 *  Otherwise those browsers will be 'catched' by the iphone string.
 	 *
+	 * @param string $type Type of iPhone detection.
 	 */
-	static function is_iphone_or_ipod( $type = 'iphone-any' ) {
-
-		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
-			return false;
-		}
-
-		$ua        = strtolower( $_SERVER['HTTP_USER_AGENT'] );
-		$is_iphone = ( strpos( $ua, 'iphone' ) !== false ) || ( strpos( $ua, 'ipod' ) !== false );
-		$is_safari = ( false !== strpos( $ua, 'safari' ) );
-
-		if ( 'iphone-safari' == $type ) {
-			return $is_iphone && $is_safari;
-		} elseif ( 'iphone-not-safari' == $type ) {
-			return $is_iphone && ! $is_safari;
-		} else {
-			return $is_iphone;
-		}
+	public static function is_iphone_or_ipod( $type = 'iphone-any' ) {
+		_deprecated_function( __METHOD__, 'Jetpack 8.7', '\Automattic\Jetpack\Device_Detection\User_Agent_Info::is_iphone_or_ipod from the `automattic/jetpack-device-detection` package' );
+		return User_Agent_Info::is_iphone_or_ipod( $type );
 	}
 
-
-	/*
-	*  Detects if the current UA is Chrome for iOS
-	*
-	*  The User-Agent string in Chrome for iOS is the same as the Mobile Safari User-Agent, with CriOS/<ChromeRevision> instead of Version/<VersionNum>.
-	*  - Mozilla/5.0 (iPhone; U; CPU iPhone OS 5_1_1 like Mac OS X; en) AppleWebKit/534.46.0 (KHTML, like Gecko) CriOS/19.0.1084.60 Mobile/9B206 Safari/7534.48.3
-	*/
-	static function is_chrome_for_iOS() {
-		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
-			return false;
-		}
-
-		if ( self::is_iphone_or_ipod( 'iphone-safari' ) === false ) {
-			return false;
-		}
-
-		$ua = strtolower( $_SERVER['HTTP_USER_AGENT'] );
-
-		if ( strpos( $ua, 'crios/' ) !== false ) {
-			return true;
-		} else {
-			return false;
-		}
+	/**
+	 *  Detects if the current UA is Chrome for iOS
+	 *
+	 *  The User-Agent string in Chrome for iOS is the same as the Mobile Safari User-Agent, with CriOS/<ChromeRevision> instead of Version/<VersionNum>.
+	 *  - Mozilla/5.0 (iPhone; U; CPU iPhone OS 5_1_1 like Mac OS X; en) AppleWebKit/534.46.0 (KHTML, like Gecko) CriOS/19.0.1084.60 Mobile/9B206 Safari/7534.48.3
+	 */
+	public static function is_chrome_for_iOS() {
+		_deprecated_function( __METHOD__, 'Jetpack 8.7', '\Automattic\Jetpack\Device_Detection\User_Agent_Info::is_chrome_for_iOS from the `automattic/jetpack-device-detection` package' );
+		return User_Agent_Info::is_chrome_for_iOS();
 	}
 
-
-	/*
+	/**
 	 *  Detects if the current UA is Twitter for iPhone
 	 *
 	 * Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_3_5 like Mac OS X; nb-no) AppleWebKit/533.17.9 (KHTML, like Gecko) Mobile/8L1 Twitter for iPhone
 	 * Mozilla/5.0 (iPhone; CPU iPhone OS 5_1_1 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Mobile/9B206 Twitter for iPhone
-	 *
 	 */
-	static function is_twitter_for_iphone() {
-		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
-			return false;
-		}
-
-		$ua = strtolower( $_SERVER['HTTP_USER_AGENT'] );
-
-		if ( strpos( $ua, 'ipad' ) !== false ) {
-			return false;
-		}
-
-		if ( strpos( $ua, 'twitter for iphone' ) !== false ) {
-			return true;
-		} else {
-			return false;
-		}
+	public static function is_twitter_for_iphone() {
+		_deprecated_function( __METHOD__, 'Jetpack 8.7', '\Automattic\Jetpack\Device_Detection\User_Agent_Info::is_twitter_for_iphone from the `automattic/jetpack-device-detection` package' );
+		return User_Agent_Info::is_twitter_for_iphone();
 	}
 
-	/*
+	/**
 	 * Detects if the current UA is Twitter for iPad
 	 *
 	 * Old version 4.X - Mozilla/5.0 (iPad; U; CPU OS 4_3_5 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Mobile/8L1 Twitter for iPad
 	 * Ver 5.0 or Higher - Mozilla/5.0 (iPad; CPU OS 5_1_1 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Mobile/9B206 Twitter for iPhone
-	 *
 	 */
-	static function is_twitter_for_ipad() {
-		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
-			return false;
-		}
-
-		$ua = strtolower( $_SERVER['HTTP_USER_AGENT'] );
-
-		if ( strpos( $ua, 'twitter for ipad' ) !== false ) {
-			return true;
-		} elseif ( strpos( $ua, 'ipad' ) !== false && strpos( $ua, 'twitter for iphone' ) !== false ) {
-			return true;
-		} else {
-			return false;
-		}
+	public static function is_twitter_for_ipad() {
+		_deprecated_function( __METHOD__, 'Jetpack 8.7', '\Automattic\Jetpack\Device_Detection\User_Agent_Info::is_twitter_for_ipad from the `automattic/jetpack-device-detection` package' );
+		return User_Agent_Info::is_twitter_for_ipad();
 	}
 
-
-	/*
+	/**
 	 * Detects if the current UA is Facebook for iPhone
 	 * - Facebook 4020.0 (iPhone; iPhone OS 5.0.1; fr_FR)
 	 * - Mozilla/5.0 (iPhone; U; CPU iPhone OS 5_0 like Mac OS X; en_US) AppleWebKit (KHTML, like Gecko) Mobile [FBAN/FBForIPhone;FBAV/4.0.2;FBBV/4020.0;FBDV/iPhone3,1;FBMD/iPhone;FBSN/iPhone OS;FBSV/5.0;FBSS/2; FBCR/O2;FBID/phone;FBLC/en_US;FBSF/2.0]
 	 * - Mozilla/5.0 (iPhone; CPU iPhone OS 5_1_1 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Mobile/9B206 [FBAN/FBIOS;FBAV/5.0;FBBV/47423;FBDV/iPhone3,1;FBMD/iPhone;FBSN/iPhone OS;FBSV/5.1.1;FBSS/2; FBCR/3ITA;FBID/phone;FBLC/en_US]
 	 */
-	static function is_facebook_for_iphone() {
-		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
-			return false;
-		}
-
-		$ua = strtolower( $_SERVER['HTTP_USER_AGENT'] );
-
-		if ( false === strpos( $ua, 'iphone' ) ) {
-			return false;
-		}
-
-		if ( false !== strpos( $ua, 'facebook' ) && false === strpos( $ua, 'ipad' ) ) {
-			return true;
-		} elseif ( false !== strpos( $ua, 'fbforiphone' ) && false === strpos( $ua, 'tablet' ) ) {
-			return true;
-		} elseif ( false !== strpos( $ua, 'fban/fbios;' ) && false === strpos( $ua, 'tablet' ) ) { // FB app v5.0 or higher
-			return true;
-		} else {
-			return false;
-		}
+	public static function is_facebook_for_iphone() {
+		_deprecated_function( __METHOD__, 'Jetpack 8.7', '\Automattic\Jetpack\Device_Detection\User_Agent_Info::is_facebook_for_iphone from the `automattic/jetpack-device-detection` package' );
+		return User_Agent_Info::is_facebook_for_iphone();
 	}
 
-	/*
+	/**
 	 * Detects if the current UA is Facebook for iPad
 	 * - Facebook 4020.0 (iPad; iPhone OS 5.0.1; en_US)
 	 * - Mozilla/5.0 (iPad; U; CPU iPhone OS 5_0 like Mac OS X; en_US) AppleWebKit (KHTML, like Gecko) Mobile [FBAN/FBForIPhone;FBAV/4.0.2;FBBV/4020.0;FBDV/iPad2,1;FBMD/iPad;FBSN/iPhone OS;FBSV/5.0;FBSS/1; FBCR/;FBID/tablet;FBLC/en_US;FBSF/1.0]
 	 * - Mozilla/5.0 (iPad; CPU OS 6_0 like Mac OS X) AppleWebKit/536.26 (KHTML, like Gecko) Mobile/10A403 [FBAN/FBIOS;FBAV/5.0;FBBV/47423;FBDV/iPad2,1;FBMD/iPad;FBSN/iPhone OS;FBSV/6.0;FBSS/1; FBCR/;FBID/tablet;FBLC/en_US]
 	 */
-	static function is_facebook_for_ipad() {
-		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
-			return false;
-		}
-
-		$ua = strtolower( $_SERVER['HTTP_USER_AGENT'] );
-
-		if ( false === strpos( $ua, 'ipad' ) ) {
-			return false;
-		}
-
-		if ( false !== strpos( $ua, 'facebook' ) || false !== strpos( $ua, 'fbforiphone' ) || false !== strpos( $ua, 'fban/fbios;' ) ) {
-			return true;
-		} else {
-			return false;
-		}
+	public static function is_facebook_for_ipad() {
+		_deprecated_function( __METHOD__, 'Jetpack 8.7', '\Automattic\Jetpack\Device_Detection\User_Agent_Info::is_facebook_for_ipad from the `automattic/jetpack-device-detection` package' );
+		return User_Agent_Info::is_facebook_for_ipad();
 	}
 
-	/*
+	/**
 	 *  Detects if the current UA is WordPress for iOS
 	 */
-	static function is_wordpress_for_ios() {
-		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
-			return false;
-		}
-
-		$ua = strtolower( $_SERVER['HTTP_USER_AGENT'] );
-		if ( false !== strpos( $ua, 'wp-iphone' ) ) {
-			return true;
-		} else {
-			return false;
-		}
+	public static function is_wordpress_for_ios() {
+		_deprecated_function( __METHOD__, 'Jetpack 8.7', '\Automattic\Jetpack\Device_Detection\User_Agent_Info::is_wordpress_for_ios from the `automattic/jetpack-device-detection` package' );
+		return User_Agent_Info::is_wordpress_for_ios();
 	}
 
-	/*
+	/**
 	 * Detects if the current device is an iPad.
 	 * They type can check for any iPad, an iPad using Safari, or an iPad using something other than Safari.
 	 *
@@ -685,95 +187,48 @@ static function is_wordpress_for_ios() {
 	 * you should put the check condition before the check for 'iphone-any' or 'iphone-not-safari'.
 	 * Otherwise those browsers will be 'catched' by the ipad string.
 	 *
-	*/
-	static function is_ipad( $type = 'ipad-any' ) {
-
-		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
-			return false;
-		}
-
-		$ua = strtolower( $_SERVER['HTTP_USER_AGENT'] );
-
-		$is_ipad   = ( false !== strpos( $ua, 'ipad' ) );
-		$is_safari = ( false !== strpos( $ua, 'safari' ) );
-
-		if ( 'ipad-safari' == $type ) {
-			return $is_ipad && $is_safari;
-		} elseif ( 'ipad-not-safari' == $type ) {
-			return $is_ipad && ! $is_safari;
-		} else {
-			return $is_ipad;
-		}
+	 * @param string $type iPad type.
+	 */
+	public static function is_ipad( $type = 'ipad-any' ) {
+		_deprecated_function( __METHOD__, 'Jetpack 8.7', '\Automattic\Jetpack\Device_Detection\User_Agent_Info::is_ipad from the `automattic/jetpack-device-detection` package' );
+		return User_Agent_Info::is_ipad( $type );
 	}
 
-	/*
+	/**
 	 * Detects if the current browser is Firefox Mobile (Fennec)
 	 *
-	 * http://www.useragentstring.com/pages/Fennec/
+	 * See http://www.useragentstring.com/pages/Fennec/
 	 * Mozilla/5.0 (Windows NT 6.1; WOW64; rv:2.1.1) Gecko/20110415 Firefox/4.0.2pre Fennec/4.0.1
 	 * Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1b2pre) Gecko/20081015 Fennec/1.0a1
 	 */
-	static function is_firefox_mobile() {
-
-		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
-			return false;
-		}
-
-		$ua = strtolower( $_SERVER['HTTP_USER_AGENT'] );
-
-		if ( strpos( $ua, 'fennec' ) !== false ) {
-			return true;
-		} else {
-			return false;
-		}
+	public static function is_firefox_mobile() {
+		_deprecated_function( __METHOD__, 'Jetpack 8.7', '\Automattic\Jetpack\Device_Detection\User_Agent_Info::is_firefox_mobile from the `automattic/jetpack-device-detection` package' );
+		return User_Agent_Info::is_firefox_mobile();
 	}
 
-	/*
+	/**
 	 * Detects if the current browser is Firefox for desktop
 	 *
-	 * https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/User-Agent/Firefox
+	 * See https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/User-Agent/Firefox
 	 * Mozilla/5.0 (platform; rv:geckoversion) Gecko/geckotrail Firefox/firefoxversion
 	 * The platform section will include 'Mobile' for phones and 'Tablet' for tablets.
-	 *
 	 */
-	static function is_firefox_desktop() {
-
-		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
-			return false;
-		}
-
-		$ua = strtolower( $_SERVER['HTTP_USER_AGENT'] );
-
-		if ( false !== strpos( $ua, 'firefox' ) && false === strpos( $ua, 'mobile' ) && false === strpos( $ua, 'tablet' ) ) {
-			return true;
-		} else {
-			return false;
-		}
+	public static function is_firefox_desktop() {
+		_deprecated_function( __METHOD__, 'Jetpack 8.7', '\Automattic\Jetpack\Device_Detection\User_Agent_Info::is_firefox_desktop from the `automattic/jetpack-device-detection` package' );
+		return User_Agent_Info::is_firefox_desktop();
 	}
 
-	/*
+	/**
 	 * Detects if the current browser is FirefoxOS Native browser
-	*
-	* Mozilla/5.0 (Mobile; rv:14.0) Gecko/14.0 Firefox/14.0
-	*
-	*/
-	static function is_firefox_os() {
-
-		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
-			return false;
-		}
-
-		$ua = strtolower( $_SERVER['HTTP_USER_AGENT'] );
-
-		if ( strpos( $ua, 'mozilla' ) !== false && strpos( $ua, 'mobile' ) !== false && strpos( $ua, 'gecko' ) !== false && strpos( $ua, 'firefox' ) !== false ) {
-			return true;
-		} else {
-			return false;
-		}
+	 *
+	 * Mozilla/5.0 (Mobile; rv:14.0) Gecko/14.0 Firefox/14.0
+	 */
+	public static function is_firefox_os() {
+		_deprecated_function( __METHOD__, 'Jetpack 8.7', '\Automattic\Jetpack\Device_Detection\User_Agent_Info::is_firefox_os from the `automattic/jetpack-device-detection` package' );
+		return User_Agent_Info::is_firefox_os();
 	}
 
-
-	/*
+	/**
 	 * Detects if the current browser is Opera Mobile
 	 *
 	 * What is the difference between Opera Mobile and Opera Mini?
@@ -785,25 +240,13 @@ static function is_firefox_os() {
 	 * Opera/9.80 (Windows NT 6.1; Opera Mobi/14316; U; en) Presto/2.7.81 Version/11.00"
 	 * Opera/9.50 (Nintendo DSi; Opera/507; U; en-US)
 	 */
-	static function is_opera_mobile() {
-
-		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
-			return false;
-		}
-
-		$ua = strtolower( $_SERVER['HTTP_USER_AGENT'] );
-
-		if ( strpos( $ua, 'opera' ) !== false && strpos( $ua, 'mobi' ) !== false ) {
-			return true;
-		} elseif ( strpos( $ua, 'opera' ) !== false && strpos( $ua, 'nintendo dsi' ) !== false ) {
-			return true;
-		} else {
-			return false;
-		}
+	public static function is_opera_mobile() {
+		_deprecated_function( __METHOD__, 'Jetpack 8.7', '\Automattic\Jetpack\Device_Detection\User_Agent_Info::is_opera_mobile from the `automattic/jetpack-device-detection` package' );
+		return User_Agent_Info::is_opera_mobile();
 	}
 
 
-	/*
+	/**
 	 * Detects if the current browser is Opera Mini
 	 *
 	 * Opera/8.01 (J2ME/MIDP; Opera Mini/3.0.6306/1528; en; U; ssr)
@@ -813,164 +256,76 @@ static function is_opera_mobile() {
 	 * Opera/9.80 (J2ME/iPhone;Opera Mini/5.0.019802/886; U; ja) Presto/2.4.15
 	 * Opera/9.80 (Series 60; Opera Mini/5.1.22783/23.334; U; en) Presto/2.5.25 Version/10.54
 	 * Opera/9.80 (BlackBerry; Opera Mini/5.1.22303/22.387; U; en) Presto/2.5.25 Version/10.54
-	 *
 	 */
-	static function is_opera_mini() {
-
-		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
-			return false;
-		}
-
-		$ua = strtolower( $_SERVER['HTTP_USER_AGENT'] );
-
-		if ( strpos( $ua, 'opera' ) !== false && strpos( $ua, 'mini' ) !== false ) {
-			return true;
-		} else {
-			return false;
-		}
+	public static function is_opera_mini() {
+		_deprecated_function( __METHOD__, 'Jetpack 8.7', '\Automattic\Jetpack\Device_Detection\User_Agent_Info::is_opera_mini from the `automattic/jetpack-device-detection` package' );
+		return User_Agent_Info::is_opera_mini();
 	}
 
-	/*
+	/**
 	 * Detects if the current browser is Opera Mini, but not on a smart device OS(Android, iOS, etc)
 	 * Used to send users on dumb devices to m.wor
 	 */
-	static function is_opera_mini_dumb() {
-
-		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
-			return false;
-		}
-		$ua = strtolower( $_SERVER['HTTP_USER_AGENT'] );
-
-		if ( self::is_opera_mini() ) {
-			if ( strpos( $ua, 'android' ) !== false || strpos( $ua, 'iphone' ) !== false || strpos( $ua, 'ipod' ) !== false
-			|| strpos( $ua, 'ipad' ) !== false || strpos( $ua, 'blackberry' ) !== false ) {
-				return false;
-			} else {
-				return true;
-			}
-		} else {
-			return false;
-		}
+	public static function is_opera_mini_dumb() {
+		_deprecated_function( __METHOD__, 'Jetpack 8.7', '\Automattic\Jetpack\Device_Detection\User_Agent_Info::is_opera_mini_dumb from the `automattic/jetpack-device-detection` package' );
+		return User_Agent_Info::is_opera_mini_dumb();
 	}
 
-	/*
+	/**
 	 * Detects if the current browser is Opera Mobile or Mini.
 	 * DEPRECATED: use is_opera_mobile or is_opera_mini
 	 *
 	 * Opera Mini 5 Beta: Opera/9.80 (J2ME/MIDP; Opera Mini/5.0.15650/756; U; en) Presto/2.2.0
 	 * Opera Mini 8: Opera/8.01 (J2ME/MIDP; Opera Mini/3.0.6306/1528; en; U; ssr)
 	 */
-	static function is_OperaMobile() {
-		_deprecated_function( __FUNCTION__, 'always', 'is_opera_mini() or is_opera_mobile()' );
-
-		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
-			return false;
-		}
-
-		$ua = strtolower( $_SERVER['HTTP_USER_AGENT'] );
-
-		if ( strpos( $ua, 'opera' ) !== false ) {
-			if ( ( strpos( $ua, 'mini' ) !== false ) || ( strpos( $ua, 'mobi' ) !== false ) ) {
-				return true;
-			} else {
-				return false;
-			}
-		} else {
-			return false;
-		}
+	public static function is_OperaMobile() {
+		_deprecated_function( __METHOD__, 'Jetpack 8.7', '\Automattic\Jetpack\Device_Detection\User_Agent_Info::is_opera_mini() or \Automattic\Jetpack\Device_Detection\User_Agent_Info::is_opera_mobile() from the `automattic/jetpack-device-detection` package' );
+		return User_Agent_Info::is_OperaMobile();
 	}
 
-	/*
+	/**
 	 * Detects if the current browser is a Windows Phone 7 device.
 	 * ex: Mozilla/4.0 (compatible; MSIE 7.0; Windows Phone OS 7.0; Trident/3.1; IEMobile/7.0; LG; GW910)
 	 */
-	static function is_WindowsPhone7() {
-		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
-			return false;
-		}
-
-		$ua = strtolower( $_SERVER['HTTP_USER_AGENT'] );
-
-		if ( false === strpos( $ua, 'windows phone os 7' ) ) {
-			return false;
-		} else {
-			if ( self::is_opera_mini() || self::is_opera_mobile() || self::is_firefox_mobile() ) {
-				return false;
-			} else {
-				return true;
-			}
-		}
+	public static function is_WindowsPhone7() {
+		_deprecated_function( __METHOD__, 'Jetpack 8.7', '\Automattic\Jetpack\Device_Detection\User_Agent_Info::is_WindowsPhone7 from the `automattic/jetpack-device-detection` package' );
+		return User_Agent_Info::is_WindowsPhone7();
 	}
 
-	/*
+	/**
 	 * Detects if the current browser is a Windows Phone 8 device.
 	 * ex: Mozilla/5.0 (compatible; MSIE 10.0; Windows Phone 8.0; Trident/6.0; ARM; Touch; IEMobile/10.0; <Manufacturer>; <Device> [;<Operator>])
 	 */
-	static function is_windows_phone_8() {
-		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
-			return false;
-		}
-
-		$ua = strtolower( $_SERVER['HTTP_USER_AGENT'] );
-		if ( strpos( $ua, 'windows phone 8' ) === false ) {
-			return false;
-		} else {
-			return true;
-		}
+	public static function is_windows_phone_8() {
+		_deprecated_function( __METHOD__, 'Jetpack 8.7', '\Automattic\Jetpack\Device_Detection\User_Agent_Info::is_windows_phone_8 from the `automattic/jetpack-device-detection` package' );
+		return User_Agent_Info::is_windows_phone_8();
 	}
 
 
-	/*
+	/**
 	 * Detects if the current browser is on a Palm device running the new WebOS. This EXCLUDES TouchPad.
 	 *
-	 * ex1: Mozilla/5.0 (webOS/1.4.0; U; en-US) AppleWebKit/532.2 (KHTML, like Gecko) Version/1.0 Safari/532.2 Pre/1.1
-	 * ex2: Mozilla/5.0 (webOS/1.4.0; U; en-US) AppleWebKit/532.2 (KHTML, like Gecko) Version/1.0 Safari/532.2 Pixi/1.1
-	 *
+	 * Ex1: Mozilla/5.0 (webOS/1.4.0; U; en-US) AppleWebKit/532.2 (KHTML, like Gecko) Version/1.0 Safari/532.2 Pre/1.1
+	 * Ex2: Mozilla/5.0 (webOS/1.4.0; U; en-US) AppleWebKit/532.2 (KHTML, like Gecko) Version/1.0 Safari/532.2 Pixi/1.1
 	 */
-	static function is_PalmWebOS() {
-		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
-			return false;
-		}
-
-		$ua = strtolower( $_SERVER['HTTP_USER_AGENT'] );
-
-		if ( false === strpos( $ua, 'webos' ) ) {
-			return false;
-		} else {
-			if ( self::is_opera_mini() || self::is_opera_mobile() || self::is_firefox_mobile() ) {
-				return false;
-			} else {
-				return true;
-			}
-		}
+	public static function is_PalmWebOS() {
+		_deprecated_function( __METHOD__, 'Jetpack 8.7', '\Automattic\Jetpack\Device_Detection\User_Agent_Info::is_PalmWebOS from the `automattic/jetpack-device-detection` package' );
+		return User_Agent_Info::is_PalmWebOS();
 	}
 
-	/*
+	/**
 	 * Detects if the current browser is the HP TouchPad default browser. This excludes phones wt WebOS.
 	 *
 	 * TouchPad Emulator: Mozilla/5.0 (hp-desktop; Linux; hpwOS/2.0; U; it-IT) AppleWebKit/534.6 (KHTML, like Gecko) wOSBrowser/233.70 Safari/534.6 Desktop/1.0
 	 * TouchPad: Mozilla/5.0 (hp-tablet; Linux; hpwOS/3.0.0; U; en-US) AppleWebKit/534.6 (KHTML, like Gecko) wOSBrowser/233.70 Safari/534.6 TouchPad/1.0
-	 *
 	 */
-	static function is_TouchPad() {
-		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
-			return false;
-		}
-
-		$http_user_agent = strtolower( $_SERVER['HTTP_USER_AGENT'] );
-		if ( false !== strpos( $http_user_agent, 'hp-tablet' ) || false !== strpos( $http_user_agent, 'hpwos' ) || false !== strpos( $http_user_agent, 'touchpad' ) ) {
-			if ( self::is_opera_mini() || self::is_opera_mobile() || self::is_firefox_mobile() ) {
-				return false;
-			} else {
-				return true;
-			}
-		} else {
-			return false;
-		}
+	public static function is_TouchPad() {
+		_deprecated_function( __METHOD__, 'Jetpack 8.7', '\Automattic\Jetpack\Device_Detection\User_Agent_Info::is_TouchPad from the `automattic/jetpack-device-detection` package' );
+		return User_Agent_Info::is_TouchPad();
 	}
 
 
-	/*
+	/**
 	 * Detects if the current browser is the Series 60 Open Source Browser.
 	 *
 	 * OSS Browser 3.2 on E75: Mozilla/5.0 (SymbianOS/9.3; U; Series60/3.2 NokiaE75-1/110.48.125 Profile/MIDP-2.1 Configuration/CLDC-1.1 ) AppleWebKit/413 (KHTML, like Gecko) Safari/413
@@ -978,181 +333,64 @@ static function is_TouchPad() {
 	 * 7.0 Browser (Nokia 5800 XpressMusic (v21.0.025)) : Mozilla/5.0 (SymbianOS/9.4; U; Series60/5.0 Nokia5800d-1/21.0.025; Profile/MIDP-2.1 Configuration/CLDC-1.1 ) AppleWebKit/413 (KHTML, like Gecko) Safari/413
 	 *
 	 * Browser 7.1 (Nokia N97 (v12.0.024)) : Mozilla/5.0 (SymbianOS/9.4; Series60/5.0 NokiaN97-1/12.0.024; Profile/MIDP-2.1 Configuration/CLDC-1.1; en-us) AppleWebKit/525 (KHTML, like Gecko) BrowserNG/7.1.12344
-	 *
 	 */
-	static function is_S60_OSSBrowser() {
-
-		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
-			return false;
-		}
-
-		$agent = strtolower( $_SERVER['HTTP_USER_AGENT'] );
-		if ( self::is_opera_mini() || self::is_opera_mobile() || self::is_firefox_mobile() ) {
-			return false;
-		}
-
-		$pos_webkit = strpos( $agent, 'webkit' );
-		if ( $pos_webkit !== false ) {
-			// First, test for WebKit, then make sure it's either Symbian or S60.
-			if ( strpos( $agent, 'symbian' ) !== false || strpos( $agent, 'series60' ) !== false ) {
-					return true;
-			} else {
-				return false;
-			}
-		} elseif ( strpos( $agent, 'symbianos' ) !== false && strpos( $agent, 'series60' ) !== false ) {
-			return true;
-		} elseif ( strpos( $agent, 'nokia' ) !== false && strpos( $agent, 'series60' ) !== false ) {
-			return true;
-		}
-
-		return false;
+	public static function is_S60_OSSBrowser() {
+		_deprecated_function( __METHOD__, 'Jetpack 8.7', '\Automattic\Jetpack\Device_Detection\User_Agent_Info::is_S60_OSSBrowser from the `automattic/jetpack-device-detection` package' );
+		return User_Agent_Info::is_S60_OSSBrowser();
 	}
 
-	/*
-	 *
+	/**
 	 * Detects if the device platform is the Symbian Series 60.
-	 *
 	 */
-	static function is_symbian_platform() {
-
-		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
-			return false;
-		}
-
-		$agent = strtolower( $_SERVER['HTTP_USER_AGENT'] );
-
-		$pos_webkit = strpos( $agent, 'webkit' );
-		if ( $pos_webkit !== false ) {
-			// First, test for WebKit, then make sure it's either Symbian or S60.
-			if ( strpos( $agent, 'symbian' ) !== false || strpos( $agent, 'series60' ) !== false ) {
-					return true;
-			} else {
-				return false;
-			}
-		} elseif ( strpos( $agent, 'symbianos' ) !== false && strpos( $agent, 'series60' ) !== false ) {
-			return true;
-		} elseif ( strpos( $agent, 'nokia' ) !== false && strpos( $agent, 'series60' ) !== false ) {
-			return true;
-		} elseif ( strpos( $agent, 'opera mini' ) !== false ) {
-			if ( strpos( $agent, 'symbianos' ) !== false || strpos( $agent, 'symbos' ) !== false || strpos( $agent, 'series 60' ) !== false ) {
-				return true;
-			}
-		}
-
-		return false;
+	public static function is_symbian_platform() {
+		_deprecated_function( __METHOD__, 'Jetpack 8.7', '\Automattic\Jetpack\Device_Detection\User_Agent_Info::is_symbian_platform from the `automattic/jetpack-device-detection` package' );
+		return User_Agent_Info::is_symbian_platform();
 	}
 
-	/*
-	 *
+	/**
 	 * Detects if the device platform is the Symbian Series 40.
 	 * Nokia Browser for Series 40 is a proxy based browser, previously known as Ovi Browser.
 	 * This browser will report 'NokiaBrowser' in the header, however some older version will also report 'OviBrowser'.
-	 *
 	 */
-	static function is_symbian_s40_platform() {
-
-		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
-			return false;
-		}
-
-		$agent = strtolower( $_SERVER['HTTP_USER_AGENT'] );
-
-		if ( strpos( $agent, 'series40' ) !== false ) {
-			if ( strpos( $agent, 'nokia' ) !== false || strpos( $agent, 'ovibrowser' ) !== false || strpos( $agent, 'nokiabrowser' ) !== false ) {
-				return true;
-			}
-		}
-
-		return false;
+	public static function is_symbian_s40_platform() {
+		_deprecated_function( __METHOD__, 'Jetpack 8.7', '\Automattic\Jetpack\Device_Detection\User_Agent_Info::is_symbian_s40_platform from the `automattic/jetpack-device-detection` package' );
+		return User_Agent_Info::is_symbian_s40_platform();
 	}
 
-	static function is_J2ME_platform() {
-
-		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
-			return false;
-		}
-
-		$agent = strtolower( $_SERVER['HTTP_USER_AGENT'] );
-
-		if ( strpos( $agent, 'j2me/midp' ) !== false ) {
-			return true;
-		} elseif ( strpos( $agent, 'midp' ) !== false && strpos( $agent, 'cldc' ) ) {
-			return true;
-		}
-
-		return false;
+	/**
+	 * Returns if the device belongs to J2ME capable family.
+	 *
+	 * @return bool
+	 */
+	public static function is_J2ME_platform() {
+		_deprecated_function( __METHOD__, 'Jetpack 8.7', '\Automattic\Jetpack\Device_Detection\User_Agent_Info::is_J2ME_platform from the `automattic/jetpack-device-detection` package' );
+		return User_Agent_Info::is_J2ME_platform();
 	}
 
 
-	/*
+	/**
 	 * Detects if the current UA is on one of the Maemo-based Nokia Internet Tablets.
 	 */
-	static function is_MaemoTablet() {
-
-		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
-			return false;
-		}
-
-		$agent = strtolower( $_SERVER['HTTP_USER_AGENT'] );
-
-		$pos_maemo = strpos( $agent, 'maemo' );
-		if ( $pos_maemo === false ) {
-			return false;
-		}
-
-		// Must be Linux + Tablet, or else it could be something else.
-		if ( strpos( $agent, 'tablet' ) !== false && strpos( $agent, 'linux' ) !== false ) {
-			if ( self::is_opera_mini() || self::is_opera_mobile() || self::is_firefox_mobile() ) {
-				return false;
-			} else {
-				return true;
-			}
-		} else {
-			return false;
-		}
+	public static function is_MaemoTablet() {
+		_deprecated_function( __METHOD__, 'Jetpack 8.7', '\Automattic\Jetpack\Device_Detection\User_Agent_Info::is_MaemoTablet from the `automattic/jetpack-device-detection` package' );
+		return User_Agent_Info::is_MaemoTablet();
 	}
 
-	/*
+	/**
 	 * Detects if the current UA is a MeeGo device (Nokia Smartphone).
 	 */
-	static function is_MeeGo() {
-
-		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
-			return false;
-		}
-
-		$ua = strtolower( $_SERVER['HTTP_USER_AGENT'] );
-
-		if ( false === strpos( $ua, 'meego' ) ) {
-			return false;
-		} else {
-			if ( self::is_opera_mini() || self::is_opera_mobile() || self::is_firefox_mobile() ) {
-				return false;
-			} else {
-				return true;
-			}
-		}
+	public static function is_MeeGo() {
+		_deprecated_function( __METHOD__, 'Jetpack 8.7', '\Automattic\Jetpack\Device_Detection\User_Agent_Info::is_MeeGo from the `automattic/jetpack-device-detection` package' );
+		return User_Agent_Info::is_MeeGo();
 	}
 
 
-	/*
-	 is_webkit() can be used to check the User Agent for an webkit generic browser
+	/**
+	 * The is_webkit() method can be used to check the User Agent for an webkit generic browser.
 	 */
-	static function is_webkit() {
-
-		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
-			return false;
-		}
-
-		$agent = strtolower( $_SERVER['HTTP_USER_AGENT'] );
-
-		$pos_webkit = strpos( $agent, 'webkit' );
-
-		if ( $pos_webkit !== false ) {
-			return true;
-		} else {
-			return false;
-		}
+	public static function is_webkit() {
+		_deprecated_function( __METHOD__, 'Jetpack 8.7', '\Automattic\Jetpack\Device_Detection\User_Agent_Info::is_webkit from the `automattic/jetpack-device-detection` package' );
+		return User_Agent_Info::is_webkit();
 	}
 
 	/**
@@ -1160,51 +398,21 @@ static function is_webkit() {
 	 *
 	 * @return boolean true if the browser is Android otherwise false
 	 */
-	static function is_android() {
-		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
-			return false;
-		}
-
-		$agent       = strtolower( $_SERVER['HTTP_USER_AGENT'] );
-		$pos_android = strpos( $agent, 'android' );
-		if ( $pos_android !== false ) {
-			if ( self::is_opera_mini() || self::is_opera_mobile() || self::is_firefox_mobile() ) {
-				return false;
-			} else {
-				return true;
-			}
-		} else {
-			return false;
-		}
+	public static function is_android() {
+		_deprecated_function( __METHOD__, 'Jetpack 8.7', '\Automattic\Jetpack\Device_Detection\User_Agent_Info::is_android from the `automattic/jetpack-device-detection` package' );
+		return User_Agent_Info::is_android();
 	}
 
 
 	/**
 	 * Detects if the current browser is the Native Android Tablet browser.
-	 *  Assumes 'Android' should be in the user agent, but not 'mobile'
+	 * Assumes 'Android' should be in the user agent, but not 'mobile'
 	 *
 	 * @return boolean true if the browser is Android and not 'mobile' otherwise false
 	 */
-	static function is_android_tablet() {
-		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
-			return false;
-		}
-
-		$agent = strtolower( $_SERVER['HTTP_USER_AGENT'] );
-
-		$pos_android      = strpos( $agent, 'android' );
-		$pos_mobile       = strpos( $agent, 'mobile' );
-		$post_android_app = strpos( $agent, 'wp-android' );
-
-		if ( false !== $pos_android && false === $pos_mobile && false === $post_android_app ) {
-			if ( self::is_opera_mini() || self::is_opera_mobile() || self::is_firefox_mobile() ) {
-				return false;
-			} else {
-				return true;
-			}
-		} else {
-			return false;
-		}
+	public static function is_android_tablet() {
+		_deprecated_function( __METHOD__, 'Jetpack 8.7', '\Automattic\Jetpack\Device_Detection\User_Agent_Info::is_android_tablet from the `automattic/jetpack-device-detection` package' );
+		return User_Agent_Info::is_android_tablet();
 	}
 
 	/**
@@ -1215,22 +423,11 @@ static function is_android_tablet() {
 	 *
 	 * @return boolean true if the browser is Kindle Fire Native browser otherwise false
 	 */
-	static function is_kindle_fire() {
-		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
-			return false;
-		}
-
-		$agent        = strtolower( $_SERVER['HTTP_USER_AGENT'] );
-		$pos_silk     = strpos( $agent, 'silk/' );
-		$pos_silk_acc = strpos( $agent, 'silk-accelerated=' );
-		if ( $pos_silk !== false && $pos_silk_acc !== false ) {
-			return true;
-		} else {
-			return false;
-		}
+	public static function is_kindle_fire() {
+		_deprecated_function( __METHOD__, 'Jetpack 8.7', '\Automattic\Jetpack\Device_Detection\User_Agent_Info::is_kindle_fire from the `automattic/jetpack-device-detection` package' );
+		return User_Agent_Info::is_kindle_fire();
 	}
 
-
 	/**
 	 * Detects if the current browser is the Kindle Touch Native browser
 	 *
@@ -1238,120 +435,61 @@ static function is_kindle_fire() {
 	 *
 	 * @return boolean true if the browser is Kindle monochrome Native browser otherwise false
 	 */
-	static function is_kindle_touch() {
-		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
-			return false;
-		}
-		$agent            = strtolower( $_SERVER['HTTP_USER_AGENT'] );
-		$pos_kindle_touch = strpos( $agent, 'kindle/3.0+' );
-		if ( false !== $pos_kindle_touch && false === self::is_kindle_fire() ) {
-			return true;
-		} else {
-			return false;
-		}
+	public static function is_kindle_touch() {
+		_deprecated_function( __METHOD__, 'Jetpack 8.7', '\Automattic\Jetpack\Device_Detection\User_Agent_Info::is_kindle_touch from the `automattic/jetpack-device-detection` package' );
+		return User_Agent_Info::is_kindle_touch();
 	}
 
 
-	// Detect if user agent is the WordPress.com Windows 8 app (used ONLY on the custom oauth stylesheet)
-	static function is_windows8_auth() {
-		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
-			return false;
-		}
-
-		$agent = strtolower( $_SERVER['HTTP_USER_AGENT'] );
-		$pos   = strpos( $agent, 'msauthhost' );
-		if ( false !== $pos ) {
-			return true;
-		} else {
-			return false;
-		}
+	/**
+	 * Detect if user agent is the WordPress.com Windows 8 app (used ONLY on the custom oauth stylesheet)
+	 */
+	public static function is_windows8_auth() {
+		_deprecated_function( __METHOD__, 'Jetpack 8.7', '\Automattic\Jetpack\Device_Detection\User_Agent_Info::is_windows8_auth from the `automattic/jetpack-device-detection` package' );
+		return User_Agent_Info::is_windows8_auth();
 	}
 
-	// Detect if user agent is the WordPress.com Windows 8 app.
-	static function is_wordpress_for_win8() {
-		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
-			return false;
-		}
-
-		$agent = strtolower( $_SERVER['HTTP_USER_AGENT'] );
-		$pos   = strpos( $agent, 'wp-windows8' );
-		if ( false !== $pos ) {
-			return true;
-		} else {
-			return false;
-		}
+	/**
+	 * Detect if user agent is the WordPress.com Windows 8 app.
+	 */
+	public static function is_wordpress_for_win8() {
+		_deprecated_function( __METHOD__, 'Jetpack 8.7', '\Automattic\Jetpack\Device_Detection\User_Agent_Info::is_wordpress_for_win8 from the `automattic/jetpack-device-detection` package' );
+		return User_Agent_Info::is_wordpress_for_win8();
 	}
 
-
-	// Detect if user agent is the WordPress.com Desktop app.
-	static function is_wordpress_desktop_app() {
-		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
-			return false;
-		}
-
-		$agent = strtolower( $_SERVER['HTTP_USER_AGENT'] );
-		$pos   = strpos( $agent, 'WordPressDesktop' );
-		if ( false !== $pos ) {
-			return true;
-		} else {
-			return false;
-		}
+	/**
+	 * Detect if user agent is the WordPress.com Desktop app.
+	 */
+	public static function is_wordpress_desktop_app() {
+		_deprecated_function( __METHOD__, 'Jetpack 8.7', '\Automattic\Jetpack\Device_Detection\User_Agent_Info::is_wordpress_desktop_app from the `automattic/jetpack-device-detection` package' );
+		return User_Agent_Info::is_wordpress_desktop_app();
 	}
 
-
-	/*
-	 * is_blackberry_tablet() can be used to check the User Agent for a RIM blackberry tablet
+	/**
+	 * The is_blackberry_tablet() method can be used to check the User Agent for a RIM blackberry tablet.
 	 * The user agent of the BlackBerry® Tablet OS follows a format similar to the following:
 	 * Mozilla/5.0 (PlayBook; U; RIM Tablet OS 1.0.0; en-US) AppleWebKit/534.8+ (KHTML, like Gecko) Version/0.0.1 Safari/534.8+
-	 *
 	 */
-	static function is_blackberry_tablet() {
-
-		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
-			return false;
-		}
-
-		$agent          = strtolower( $_SERVER['HTTP_USER_AGENT'] );
-		$pos_playbook   = stripos( $agent, 'PlayBook' );
-		$pos_rim_tablet = stripos( $agent, 'RIM Tablet' );
-
-		if ( ( false === $pos_playbook ) || ( false === $pos_rim_tablet ) ) {
-			return false;
-		} else {
-			return true;
-		}
+	public static function is_blackberry_tablet() {
+		_deprecated_function( __METHOD__, 'Jetpack 8.7', '\Automattic\Jetpack\Device_Detection\User_Agent_Info::is_blackberry_tablet from the `automattic/jetpack-device-detection` package' );
+		return User_Agent_Info::is_blackberry_tablet();
 	}
 
-	/*
-	 is_blackbeberry() can be used to check the User Agent for a blackberry device
-	 Note that opera mini on BB matches this rule.
+	/**
+	 * The is_blackbeberry() method can be used to check the User Agent for a blackberry device.
+	 * Note that opera mini on BB matches this rule.
 	 */
-	static function is_blackbeberry() {
-
-		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
-			return false;
-		}
-
-		$agent = strtolower( $_SERVER['HTTP_USER_AGENT'] );
-
-		$pos_blackberry = strpos( $agent, 'blackberry' );
-		if ( $pos_blackberry !== false ) {
-			if ( self::is_opera_mini() || self::is_opera_mobile() || self::is_firefox_mobile() ) {
-				return false;
-			} else {
-				return true;
-			}
-		} else {
-			return false;
-		}
+	public static function is_blackbeberry() {
+		_deprecated_function( __METHOD__, 'Jetpack 8.7', '\Automattic\Jetpack\Device_Detection\User_Agent_Info::is_blackbeberry from the `automattic/jetpack-device-detection` package' );
+		return User_Agent_Info::is_blackbeberry();
 	}
 
-	/*
-	 is_blackberry_10() can be used to check the User Agent for a BlackBerry 10 device.
-	*/
-	static function is_blackberry_10() {
-		$agent = strtolower( $_SERVER['HTTP_USER_AGENT'] );
-		return ( strpos( $agent, 'bb10' ) !== false ) && ( strpos( $agent, 'mobile' ) !== false );
+	/**
+	 * The is_blackberry_10() method can be used to check the User Agent for a BlackBerry 10 device.
+	 */
+	public static function is_blackberry_10() {
+		_deprecated_function( __METHOD__, 'Jetpack 8.7', '\Automattic\Jetpack\Device_Detection\User_Agent_Info::is_blackberry_10 from the `automattic/jetpack-device-detection` package' );
+		return User_Agent_Info::is_blackberry_10();
 	}
 
 	/**
@@ -1370,76 +508,9 @@ static function is_blackberry_10() {
 	 * @return string Version of the BB OS.
 	 * If version is not found, get_blackbeberry_OS_version will return boolean false.
 	 */
-	static function get_blackbeberry_OS_version() {
-
-		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
-			return false;
-		}
-
-		if ( self::is_blackberry_10() ) {
-			return 'blackberry-10';
-		}
-
-		$agent = strtolower( $_SERVER['HTTP_USER_AGENT'] );
-
-		$pos_blackberry = stripos( $agent, 'blackberry' );
-		if ( false === $pos_blackberry ) {
-			// not a blackberry device
-			return false;
-		}
-
-		// blackberry devices OS 6.0 or higher
-		// Mozilla/5.0 (BlackBerry; U; BlackBerry 9670; en) AppleWebKit/534.3+ (KHTML, like Gecko) Version/6.0.0.286 Mobile Safari/534.3+
-		// Mozilla/5.0 (BlackBerry; U; BlackBerry 9800; en) AppleWebKit/534.1+ (KHTML, Like Gecko) Version/6.0.0.141 Mobile Safari/534.1+
-		// Mozilla/5.0 (BlackBerry; U; BlackBerry 9900; en-US) AppleWebKit/534.11+ (KHTML, like Gecko) Version/7.0.0 Mobile Safari/534.11+
-		$pos_webkit = stripos( $agent, 'webkit' );
-		if ( false !== $pos_webkit ) {
-			// detected blackberry webkit browser
-			$pos_torch = stripos( $agent, 'BlackBerry 9800' );
-			if ( false !== $pos_torch ) {
-				return 'blackberry-torch'; // match the torch first edition. the 2nd edition should use the OS7 and doesn't need any special rule
-			} else {
-				// detecting the BB OS version for devices running OS 6.0 or higher
-				if ( preg_match( '#Version\/([\d\.]+)#i', $agent, $matches ) ) {
-					$version     = $matches[1];
-					$version_num = explode( '.', $version );
-					if ( false === is_array( $version_num ) || count( $version_num ) <= 1 ) {
-						return 'blackberry-6'; // not a BB device that match our rule.
-					} else {
-						return 'blackberry-' . $version_num[0];
-					}
-				} else {
-					// if doesn't match returns the minimun version with a webkit browser. we should never fall here.
-					return 'blackberry-6'; // not a BB device that match our rule.
-				}
-			}
-		}
-
-		// blackberry devices <= 5.XX
-		// BlackBerry9000/5.0.0.93 Profile/MIDP-2.0 Configuration/CLDC-1.1 VendorID/179
-		if ( preg_match( '#BlackBerry\w+\/([\d\.]+)#i', $agent, $matches ) ) {
-			$version = $matches[1];
-		} else {
-			return false; // not a BB device that match our rule.
-		}
-
-		$version_num = explode( '.', $version );
-
-		if ( is_array( $version_num ) === false || count( $version_num ) <= 1 ) {
-			return false;
-		}
-		if ( $version_num[0] == 5 ) {
-			return 'blackberry-5';
-		} elseif ( $version_num[0] == 4 && $version_num[1] == 7 ) {
-			return 'blackberry-4.7';
-		} elseif ( $version_num[0] == 4 && $version_num[1] == 6 ) {
-			return 'blackberry-4.6';
-		} elseif ( $version_num[0] == 4 && $version_num[1] == 5 ) {
-			return 'blackberry-4.5';
-		} else {
-			return false;
-		}
-
+	public static function get_blackbeberry_OS_version() {
+		_deprecated_function( __METHOD__, 'Jetpack 8.7', '\Automattic\Jetpack\Device_Detection\User_Agent_Info::get_blackbeberry_OS_version from the `automattic/jetpack-device-detection` package' );
+		return User_Agent_Info::get_blackbeberry_OS_version();
 	}
 
 	/**
@@ -1455,99 +526,30 @@ static function get_blackbeberry_OS_version() {
 	 * @return string Type of the BB browser.
 	 * If browser's version is not found, detect_blackbeberry_browser_version will return boolean false.
 	 */
-	static function detect_blackberry_browser_version() {
-
-		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
-			return false;
-		}
-
-		$agent = strtolower( $_SERVER['HTTP_USER_AGENT'] );
-
-		if ( self::is_blackberry_10() ) {
-			return 'blackberry-10';
-		}
-
-		$pos_blackberry = strpos( $agent, 'blackberry' );
-		if ( false === $pos_blackberry ) {
-			// not a blackberry device
-			return false;
-		}
-
-		$pos_webkit = strpos( $agent, 'webkit' );
-
-		if ( ! ( false === $pos_webkit ) ) {
-			return 'blackberry-webkit';
-		} else {
-			if ( preg_match( '#BlackBerry\w+\/([\d\.]+)#i', $agent, $matches ) ) {
-				$version = $matches[1];
-			} else {
-				return false; // not a BB device that match our rule.
-			}
-
-			$version_num = explode( '.', $version );
-
-			if ( false === is_array( $version_num ) || count( $version_num ) <= 1 ) {
-				return false;
-			}
-
-			if ( $version_num[0] == 5 ) {
-				return 'blackberry-5';
-			} elseif ( $version_num[0] == 4 && $version_num[1] == 7 ) {
-				return 'blackberry-4.7';
-			} elseif ( $version_num[0] == 4 && $version_num[1] == 6 ) {
-				return 'blackberry-4.6';
-			} else {
-				// A very old BB device is found or this is a BB device that doesn't match our rules.
-				return false;
-			}
-		}
-
+	public static function detect_blackberry_browser_version() {
+		_deprecated_function( __METHOD__, 'Jetpack 8.7', '\Automattic\Jetpack\Device_Detection\User_Agent_Info::detect_blackberry_browser_version from the `automattic/jetpack-device-detection` package' );
+		return User_Agent_Info::detect_blackberry_browser_version();
 	}
 
-	// Checks if a visitor is coming from one of the WordPress mobile apps
-	static function is_mobile_app() {
-
-		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
-			return false;
-		}
-
-		$agent = strtolower( $_SERVER['HTTP_USER_AGENT'] );
-
-		if ( isset( $_SERVER['X_USER_AGENT'] ) && preg_match( '|wp-webos|', $_SERVER['X_USER_AGENT'] ) ) {
-			return true; // wp4webos 1.1 or higher
-		}
-
-		$app_agents = array( 'wp-android', 'wp-blackberry', 'wp-iphone', 'wp-nokia', 'wp-webos', 'wp-windowsphone' );
-		// the mobile reader on iOS has an incorrect UA when loading the reader
-		// currently it is the default one provided by the iOS framework which
-		// causes problems with 2-step-auth
-		// User-Agent	WordPress/3.1.4 CFNetwork/609 Darwin/13.0.0
-		$app_agents[] = 'wordpress/3.1';
-
-		foreach ( $app_agents as $app_agent ) {
-			if ( false !== strpos( $agent, $app_agent ) ) {
-				return true;
-			}
-		}
-		return false;
+	/**
+	 * Checks if a visitor is coming from one of the WordPress mobile apps.
+	 *
+	 * @return bool
+	 */
+	public static function is_mobile_app() {
+		_deprecated_function( __METHOD__, 'Jetpack 8.7', '\Automattic\Jetpack\Device_Detection\User_Agent_Info::is_mobile_app from the `automattic/jetpack-device-detection` package' );
+		return User_Agent_Info::is_mobile_app();
 	}
 
-	/*
+	/**
 	 * Detects if the current browser is Nintendo 3DS handheld.
 	 *
-	 * example: Mozilla/5.0 (Nintendo 3DS; U; ; en) Version/1.7498.US
+	 * Example: Mozilla/5.0 (Nintendo 3DS; U; ; en) Version/1.7498.US
 	 * can differ in language, version and region
 	 */
-	static function is_Nintendo_3DS() {
-		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
-			return false;
-		}
-
-		$ua = strtolower( $_SERVER['HTTP_USER_AGENT'] );
-		if ( strpos( $ua, 'nintendo 3ds' ) !== false ) {
-			return true;
-		}
-		return false;
+	public static function is_Nintendo_3DS() {
+		_deprecated_function( __METHOD__, 'Jetpack 8.7', '\Automattic\Jetpack\Device_Detection\User_Agent_Info::is_Nintendo_3DS from the `automattic/jetpack-device-detection` package' );
+		return User_Agent_Info::is_Nintendo_3DS();
 	}
 
 	/**
@@ -1555,99 +557,21 @@ static function is_Nintendo_3DS() {
 	 *
 	 * @return boolean
 	 */
-	static function is_bot() {
-		static $is_bot = null;
-
-		if ( is_null( $is_bot ) ) {
-			$is_bot = self::is_bot_user_agent( $_SERVER['HTTP_USER_AGENT'] );
-		}
-
-		return $is_bot;
+	public static function is_bot() {
+		_deprecated_function( __METHOD__, 'Jetpack 8.7', '\Automattic\Jetpack\Device_Detection\User_Agent_Info::is_bot from the `automattic/jetpack-device-detection` package' );
+		return User_Agent_Info::is_bot();
 	}
 
 	/**
 	 * Is the given user-agent a known bot?
 	 * If you want an is_bot check for the current request's UA, use is_bot() instead of passing a user-agent to this method.
 	 *
-	 * @param $ua (string) A user-agent string
+	 * @param string $ua A user-agent string.
+	 *
 	 * @return boolean
 	 */
-	static function is_bot_user_agent( $ua = null ) {
-
-		if ( empty( $ua ) ) {
-			return false;
-		}
-
-		$bot_agents = array(
-			'alexa',
-			'altavista',
-			'ask jeeves',
-			'attentio',
-			'baiduspider',
-			'bingbot',
-			'chtml generic',
-			'crawler',
-			'fastmobilecrawl',
-			'feedfetcher-google',
-			'firefly',
-			'froogle',
-			'gigabot',
-			'googlebot',
-			'googlebot-mobile',
-			'heritrix',
-			'httrack',
-			'ia_archiver',
-			'irlbot',
-			'iescholar',
-			'infoseek',
-			'jumpbot',
-			'linkcheck',
-			'lycos',
-			'mediapartners',
-			'mediobot',
-			'motionbot',
-			'msnbot',
-			'mshots',
-			'openbot',
-			'pss-webkit-request',
-			'pythumbnail',
-			'scooter',
-			'slurp',
-			'snapbot',
-			'spider',
-			'taptubot',
-			'technoratisnoop',
-			'teoma',
-			'twiceler',
-			'yahooseeker',
-			'yahooysmcm',
-			'yammybot',
-			'ahrefsbot',
-			'pingdom.com_bot',
-			'kraken',
-			'yandexbot',
-			'twitterbot',
-			'tweetmemebot',
-			'openhosebot',
-			'queryseekerspider',
-			'linkdexbot',
-			'grokkit-crawler',
-			'livelapbot',
-			'germcrawler',
-			'domaintunocrawler',
-			'grapeshotcrawler',
-			'cloudflare-alwaysonline',
-		);
-
-		foreach ( $bot_agents as $bot_agent ) {
-			if ( false !== stripos( $ua, $bot_agent ) ) {
-				return true;
-			}
-		}
-
-		return false;
+	public static function is_bot_user_agent( $ua = null ) {
+		_deprecated_function( __METHOD__, 'Jetpack 8.7', '\Automattic\Jetpack\Device_Detection\User_Agent_Info::is_bot_user_agent from the `automattic/jetpack-device-detection` package' );
+		return User_Agent_Info::is_bot_user_agent( $ua );
 	}
-
-
-
 }
diff --git a/class.jetpack.php b/class.jetpack.php
index 1dbc058f6c728..4464f9cd528e6 100644
--- a/class.jetpack.php
+++ b/class.jetpack.php
@@ -18,6 +18,7 @@
 use Automattic\Jetpack\Tracking;
 use Automattic\Jetpack\Plugin\Tracking as Plugin_Tracking;
 use Automattic\Jetpack\Redirect;
+use Automattic\Jetpack\Device_Detection\User_Agent_Info;
 
 /*
 Options:
@@ -709,10 +710,14 @@ private function __construct() {
 			jetpack_require_lib( 'functions.wp-notify' );
 		}
 
-		// Hide edit post link if mobile app.
-		if ( Jetpack_User_Agent_Info::is_mobile_app() ) {
-			add_filter( 'get_edit_post_link', '__return_empty_string' );
-		}
+		add_action(
+			'plugins_loaded',
+			function() {
+				if ( User_Agent_Info::is_mobile_app() ) {
+					add_filter( 'get_edit_post_link', '__return_empty_string' );
+				}
+			}
+		);
 
 		// Update the Jetpack plan from API on heartbeats.
 		add_action( 'jetpack_heartbeat', array( 'Jetpack_Plan', 'refresh_from_wpcom' ) );
diff --git a/composer.json b/composer.json
index 10cbfa418a590..ed3d98f4a4589 100644
--- a/composer.json
+++ b/composer.json
@@ -19,6 +19,7 @@
 		"automattic/jetpack-config": "@dev",
 		"automattic/jetpack-connection": "@dev",
 		"automattic/jetpack-constants": "@dev",
+		"automattic/jetpack-device-detection": "@dev",
 		"automattic/jetpack-error": "@dev",
 		"automattic/jetpack-jitm": "@dev",
 		"automattic/jetpack-logo": "@dev",
diff --git a/composer.lock b/composer.lock
index 61bfe3c54b157..65e74040ea00f 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,15 +4,15 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "58f387a3c22ca2f1f72bbe45c61535e3",
+    "content-hash": "b7a561c610eae014a3cd8709e7decc72",
     "packages": [
         {
             "name": "automattic/jetpack-abtest",
-            "version": "dev-retry/phpcs-changed",
+            "version": "dev-add/jetpack-mobile-package",
             "dist": {
                 "type": "path",
                 "url": "./packages/abtest",
-                "reference": "b873be98786907a49ac5cd21836167f662212aa0"
+                "reference": "c3681b3eac3d0e5625de758218fd1e8994e06302"
             },
             "require": {
                 "automattic/jetpack-connection": "@dev",
@@ -24,9 +24,9 @@
             },
             "type": "library",
             "autoload": {
-                "psr-4": {
-                    "Automattic\\Jetpack\\": "src/"
-                }
+                "classmap": [
+                    "src/"
+                ]
             },
             "scripts": {
                 "phpunit": [
@@ -41,24 +41,25 @@
         },
         {
             "name": "automattic/jetpack-assets",
-            "version": "dev-retry/phpcs-changed",
+            "version": "dev-add/jetpack-mobile-package",
             "dist": {
                 "type": "path",
                 "url": "./packages/assets",
-                "reference": "e93b5911e77ff0abfad498e99edbb5f6a8a124a9"
+                "reference": "b97ce83f38d0ccf58be9eefd2d676973279ad066"
             },
             "require": {
                 "automattic/jetpack-constants": "@dev"
             },
             "require-dev": {
+                "brain/monkey": "2.4.0",
                 "php-mock/php-mock": "^2.1",
                 "phpunit/phpunit": "^5.7 || ^6.5 || ^7.5"
             },
             "type": "library",
             "autoload": {
-                "psr-4": {
-                    "Automattic\\Jetpack\\": "src/"
-                }
+                "classmap": [
+                    "src/"
+                ]
             },
             "scripts": {
                 "phpunit": [
@@ -73,7 +74,7 @@
         },
         {
             "name": "automattic/jetpack-autoloader",
-            "version": "dev-retry/phpcs-changed",
+            "version": "dev-add/jetpack-mobile-package",
             "dist": {
                 "type": "path",
                 "url": "./packages/autoloader",
@@ -107,20 +108,20 @@
         },
         {
             "name": "automattic/jetpack-backup",
-            "version": "dev-retry/phpcs-changed",
+            "version": "dev-add/jetpack-mobile-package",
             "dist": {
                 "type": "path",
                 "url": "./packages/backup",
-                "reference": "3dd44f29c9c6ab41cc2492675078ba8b808caea7"
+                "reference": "0ae8bfd8b87d9140066915c643fc6a00783d0032"
             },
             "type": "library",
             "autoload": {
                 "files": [
                     "actions.php"
                 ],
-                "psr-4": {
-                    "Automattic\\Jetpack\\Backup\\": "src/"
-                }
+                "classmap": [
+                    "src/"
+                ]
             },
             "license": [
                 "GPL-2.0-or-later"
@@ -129,7 +130,7 @@
         },
         {
             "name": "automattic/jetpack-compat",
-            "version": "dev-retry/phpcs-changed",
+            "version": "dev-add/jetpack-mobile-package",
             "dist": {
                 "type": "path",
                 "url": "./packages/compat",
@@ -161,7 +162,7 @@
         },
         {
             "name": "automattic/jetpack-config",
-            "version": "dev-add/deterministic-init",
+            "version": "dev-add/jetpack-mobile-package",
             "dist": {
                 "type": "path",
                 "url": "./packages/config",
@@ -180,15 +181,16 @@
         },
         {
             "name": "automattic/jetpack-connection",
-            "version": "dev-retry/phpcs-changed",
+            "version": "dev-add/jetpack-mobile-package",
             "dist": {
                 "type": "path",
                 "url": "./packages/connection",
-                "reference": "59fa2bc973303b013ce63978ff8d875d1223f510"
+                "reference": "ac53d3e65b1be0a24206dc32ef2d17a17e387fcd"
             },
             "require": {
                 "automattic/jetpack-constants": "@dev",
-                "automattic/jetpack-options": "@dev"
+                "automattic/jetpack-options": "@dev",
+                "automattic/jetpack-roles": "@dev"
             },
             "require-dev": {
                 "php-mock/php-mock": "^2.1",
@@ -196,14 +198,12 @@
             },
             "type": "library",
             "autoload": {
-                "psr-4": {
-                    "Automattic\\Jetpack\\Connection\\": "src"
-                },
                 "files": [
                     "legacy/load-ixr.php"
                 ],
                 "classmap": [
-                    "legacy"
+                    "legacy",
+                    "src/"
                 ]
             },
             "scripts": {
@@ -219,20 +219,21 @@
         },
         {
             "name": "automattic/jetpack-constants",
-            "version": "dev-retry/phpcs-changed",
+            "version": "dev-add/jetpack-mobile-package",
             "dist": {
                 "type": "path",
                 "url": "./packages/constants",
-                "reference": "a6ab6360f4b48962ec7d62b06b39d1470b1dbe95"
+                "reference": "9401a1595eba4aaa79711851ca810d497575317c"
             },
             "require-dev": {
+                "php-mock/php-mock": "^2.1",
                 "phpunit/phpunit": "^5.7 || ^6.5 || ^7.5"
             },
             "type": "library",
             "autoload": {
-                "psr-4": {
-                    "Automattic\\Jetpack\\": "src/"
-                }
+                "classmap": [
+                    "src/"
+                ]
             },
             "scripts": {
                 "phpunit": [
@@ -245,22 +246,51 @@
             ],
             "description": "A wrapper for defining constants in a more testable way."
         },
+        {
+            "name": "automattic/jetpack-device-detection",
+            "version": "dev-add/jetpack-mobile-package",
+            "dist": {
+                "type": "path",
+                "url": "./packages/device-detection",
+                "reference": "4d838c69f4869dbba9ee2752ff7c1f13b79a7d76"
+            },
+            "require-dev": {
+                "php-mock/php-mock": "^2.1",
+                "phpunit/phpunit": "^5.7 || ^6.5 || ^7.5"
+            },
+            "type": "library",
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "scripts": {
+                "phpunit": [
+                    "@composer install",
+                    "./vendor/phpunit/phpunit/phpunit --colors=always"
+                ]
+            },
+            "license": [
+                "GPL-2.0-or-later"
+            ],
+            "description": "A way to detect device types based on User-Agent header."
+        },
         {
             "name": "automattic/jetpack-error",
-            "version": "dev-retry/phpcs-changed",
+            "version": "dev-add/jetpack-mobile-package",
             "dist": {
                 "type": "path",
                 "url": "./packages/error",
-                "reference": "1707cf33a92fc66f1635dfe1e4215819101e9bb4"
+                "reference": "2f35acfb871c772dd3a81755d093b1cb295b8830"
             },
             "require-dev": {
                 "phpunit/phpunit": "^5.7 || ^6.5 || ^7.5"
             },
             "type": "library",
             "autoload": {
-                "psr-4": {
-                    "Automattic\\Jetpack\\": "src/"
-                }
+                "classmap": [
+                    "src/"
+                ]
             },
             "scripts": {
                 "phpunit": [
@@ -275,11 +305,11 @@
         },
         {
             "name": "automattic/jetpack-jitm",
-            "version": "dev-retry/phpcs-changed",
+            "version": "dev-add/jetpack-mobile-package",
             "dist": {
                 "type": "path",
                 "url": "./packages/jitm",
-                "reference": "b0c2da6ce6a0137f3a1895ab82a93ad7769fddca"
+                "reference": "0b6037dafd9d0c92b6f1106e5a468065c6d2c7c5"
             },
             "require": {
                 "automattic/jetpack-assets": "@dev",
@@ -287,6 +317,9 @@
                 "automattic/jetpack-constants": "@dev",
                 "automattic/jetpack-logo": "@dev",
                 "automattic/jetpack-options": "@dev",
+                "automattic/jetpack-partner": "@dev",
+                "automattic/jetpack-redirect": "@dev",
+                "automattic/jetpack-status": "@dev",
                 "automattic/jetpack-tracking": "@dev"
             },
             "require-dev": {
@@ -296,9 +329,9 @@
             },
             "type": "library",
             "autoload": {
-                "psr-4": {
-                    "Automattic\\Jetpack\\JITMS\\": "src/"
-                }
+                "classmap": [
+                    "src/"
+                ]
             },
             "scripts": {
                 "phpunit": [
@@ -313,11 +346,11 @@
         },
         {
             "name": "automattic/jetpack-logo",
-            "version": "dev-retry/phpcs-changed",
+            "version": "dev-add/jetpack-mobile-package",
             "dist": {
                 "type": "path",
                 "url": "./packages/logo",
-                "reference": "d8a31dfd40166c4867fa2c526a03d9df481d5610"
+                "reference": "f2b7828deb34f7bb6da24380f2a88ab98d3733df"
             },
             "require-dev": {
                 "php-mock/php-mock": "^2.1",
@@ -325,9 +358,9 @@
             },
             "type": "library",
             "autoload": {
-                "psr-4": {
-                    "Automattic\\Jetpack\\Assets\\": "src/"
-                }
+                "classmap": [
+                    "src/"
+                ]
             },
             "scripts": {
                 "phpunit": [
@@ -342,7 +375,7 @@
         },
         {
             "name": "automattic/jetpack-options",
-            "version": "dev-retry/phpcs-changed",
+            "version": "dev-add/jetpack-mobile-package",
             "dist": {
                 "type": "path",
                 "url": "./packages/options",
@@ -368,14 +401,14 @@
         },
         {
             "name": "automattic/jetpack-partner",
-            "version": "dev-add/upgrade-url-subsidiary-id",
+            "version": "dev-add/jetpack-mobile-package",
             "dist": {
                 "type": "path",
                 "url": "./packages/partner",
-                "reference": "d0174e06e76927cefcedcded30c38405357ddea6"
+                "reference": "b2726c079aec6821a02cb44829841ee01ee17c91"
             },
             "require-dev": {
-                "brain/monkey": "^2.4",
+                "brain/monkey": "2.4.0",
                 "mockery/mockery": "^1.2",
                 "php-mock/php-mock": "^2.1",
                 "phpunit/phpunit": "^5.7 || ^6.5 || ^7.5"
@@ -399,11 +432,11 @@
         },
         {
             "name": "automattic/jetpack-redirect",
-            "version": "dev-add/redirect-everything-dependency",
+            "version": "dev-add/jetpack-mobile-package",
             "dist": {
                 "type": "path",
                 "url": "./packages/redirect",
-                "reference": "3f0328ec369ca80af8eba39d9bc452e1bf9f222c"
+                "reference": "1ca7f6fe907efa8c7cc4a9e961d4a7d2e08fa5ce"
             },
             "require-dev": {
                 "phpunit/phpunit": "^5.7 || ^6.5 || ^7.5"
@@ -427,11 +460,11 @@
         },
         {
             "name": "automattic/jetpack-roles",
-            "version": "dev-retry/phpcs-changed",
+            "version": "dev-add/jetpack-mobile-package",
             "dist": {
                 "type": "path",
                 "url": "./packages/roles",
-                "reference": "f38b3379c11a05e4711b4fb29b390c8107daccd7"
+                "reference": "22dd28b575dc20f2a8e7d44f024223033c66517a"
             },
             "require-dev": {
                 "php-mock/php-mock": "^2.1",
@@ -439,9 +472,9 @@
             },
             "type": "library",
             "autoload": {
-                "psr-4": {
-                    "Automattic\\Jetpack\\": "src/"
-                }
+                "classmap": [
+                    "src/"
+                ]
             },
             "scripts": {
                 "phpunit": [
@@ -456,21 +489,22 @@
         },
         {
             "name": "automattic/jetpack-status",
-            "version": "dev-retry/phpcs-changed",
+            "version": "dev-add/jetpack-mobile-package",
             "dist": {
                 "type": "path",
                 "url": "./packages/status",
-                "reference": "99ecd79ed31dc3432892df709ba745ebc6f747e9"
+                "reference": "3844d803985e418e51e32bf7cc9c0a00b038a9f4"
             },
             "require-dev": {
+                "brain/monkey": "2.4.0",
                 "php-mock/php-mock": "^2.1",
                 "phpunit/phpunit": "^5.7 || ^6.5 || ^7.5"
             },
             "type": "library",
             "autoload": {
-                "psr-4": {
-                    "Automattic\\Jetpack\\": "src/"
-                }
+                "classmap": [
+                    "src/"
+                ]
             },
             "scripts": {
                 "phpunit": [
@@ -485,11 +519,11 @@
         },
         {
             "name": "automattic/jetpack-sync",
-            "version": "dev-retry/phpcs-changed",
+            "version": "dev-add/jetpack-mobile-package",
             "dist": {
                 "type": "path",
                 "url": "./packages/sync",
-                "reference": "1cad05fcfd38ad123af0bbf08b5a1224bd95312a"
+                "reference": "f163052f84a9656349985737f75c0e20c9a3c8e0"
             },
             "require": {
                 "automattic/jetpack-connection": "@dev",
@@ -500,10 +534,9 @@
             },
             "type": "library",
             "autoload": {
-                "psr-4": {
-                    "Automattic\\Jetpack\\Sync\\": "src/",
-                    "Automattic\\Jetpack\\Sync\\Modules\\": "src/modules/"
-                }
+                "classmap": [
+                    "src/"
+                ]
             },
             "license": [
                 "GPL-2.0-or-later"
@@ -512,11 +545,11 @@
         },
         {
             "name": "automattic/jetpack-terms-of-service",
-            "version": "dev-retry/phpcs-changed",
+            "version": "dev-add/jetpack-mobile-package",
             "dist": {
                 "type": "path",
                 "url": "./packages/terms-of-service",
-                "reference": "6f53f2987be1c025edcd7820759df50c134065e6"
+                "reference": "f97742a361eb772f8bc6f13ae9437b3e8233cb0e"
             },
             "require": {
                 "automattic/jetpack-connection": "@dev",
@@ -529,9 +562,9 @@
             },
             "type": "library",
             "autoload": {
-                "psr-4": {
-                    "Automattic\\Jetpack\\": "src/"
-                }
+                "classmap": [
+                    "src/"
+                ]
             },
             "scripts": {
                 "phpunit": [
@@ -546,11 +579,11 @@
         },
         {
             "name": "automattic/jetpack-tracking",
-            "version": "dev-retry/phpcs-changed",
+            "version": "dev-add/jetpack-mobile-package",
             "dist": {
                 "type": "path",
                 "url": "./packages/tracking",
-                "reference": "fd194dfc4f01a66de9c5b9caf239cdd806a8d3eb"
+                "reference": "f4e52837194537e90f9fa10ac7b48f25519765bd"
             },
             "require": {
                 "automattic/jetpack-options": "@dev",
@@ -562,11 +595,9 @@
             },
             "type": "library",
             "autoload": {
-                "psr-4": {
-                    "Automattic\\Jetpack\\": "src/"
-                },
                 "classmap": [
-                    "legacy"
+                    "legacy",
+                    "src/"
                 ]
             },
             "scripts": {
@@ -1019,6 +1050,7 @@
         "automattic/jetpack-config": 20,
         "automattic/jetpack-connection": 20,
         "automattic/jetpack-constants": 20,
+        "automattic/jetpack-device-detection": 20,
         "automattic/jetpack-error": 20,
         "automattic/jetpack-jitm": 20,
         "automattic/jetpack-logo": 20,
diff --git a/functions.global.php b/functions.global.php
index 8c66e5bed8555..d1f4e1a88c3dc 100644
--- a/functions.global.php
+++ b/functions.global.php
@@ -12,6 +12,7 @@
 
 use Automattic\Jetpack\Connection\Client;
 use Automattic\Jetpack\Redirect;
+use Automattic\Jetpack\Device_Detection;
 
 /**
  * Disable direct access.
@@ -305,3 +306,61 @@ function jetpack_is_file_supported_for_sideloading( $file ) {
 
 	return in_array( $type, $supported_mime_types, true );
 }
+
+/**
+ * Determine if the current User Agent matches the passed $kind
+ *
+ * @param string $kind Category of mobile device to check for.
+ *                         Either: any, dumb, smart.
+ * @param bool   $return_matched_agent Boolean indicating if the UA should be returned.
+ *
+ * @return bool|string Boolean indicating if current UA matches $kind. If
+ *                              $return_matched_agent is true, returns the UA string
+ */
+function jetpack_is_mobile( $kind = 'any', $return_matched_agent = false ) {
+
+	/**
+	 * Filter the value of jetpack_is_mobile before it is calculated.
+	 *
+	 * Passing a truthy value to the filter will short-circuit determining the
+	 * mobile type, returning the passed value instead.
+	 *
+	 * @since  4.2.0
+	 *
+	 * @param bool|string $matches Boolean if current UA matches $kind or not. If
+	 *                             $return_matched_agent is true, should return the UA string
+	 * @param string      $kind Category of mobile device being checked
+	 * @param bool        $return_matched_agent Boolean indicating if the UA should be returned
+	 */
+	$pre = apply_filters( 'pre_jetpack_is_mobile', null, $kind, $return_matched_agent );
+	if ( $pre ) {
+		return $pre;
+	}
+
+	$return      = false;
+	$device_info = Device_Detection::get_info();
+
+	if ( 'any' === $kind ) {
+		$return = $device_info['is_phone'];
+	} elseif ( 'smart' === $kind ) {
+		$return = $device_info['is_smartphone'];
+	} elseif ( 'dumb' === $kind ) {
+		$return = $device_info['is_phone'] && ! $device_info['is_smartphone'];
+	}
+
+	if ( $return_matched_agent && true === $return ) {
+		$return = $device_info['is_phone_matched_ua'];
+	}
+
+	/**
+	 * Filter the value of jetpack_is_mobile
+	 *
+	 * @since  4.2.0
+	 *
+	 * @param bool|string $matches Boolean if current UA matches $kind or not. If
+	 *                             $return_matched_agent is true, should return the UA string
+	 * @param string      $kind Category of mobile device being checked
+	 * @param bool        $return_matched_agent Boolean indicating if the UA should be returned
+	 */
+	return apply_filters( 'jetpack_is_mobile', $return, $kind, $return_matched_agent );
+}
diff --git a/modules/custom-css/custom-css.php b/modules/custom-css/custom-css.php
index 8c93dd9d07203..f91b1c5565e2c 100644
--- a/modules/custom-css/custom-css.php
+++ b/modules/custom-css/custom-css.php
@@ -2,6 +2,7 @@
 
 use Automattic\Jetpack\Assets;
 use Automattic\Jetpack\Redirect;
+use Automattic\Jetpack\Device_Detection\User_Agent_Info;
 
 class Jetpack_Custom_CSS {
 	static function init() {
@@ -24,7 +25,7 @@ static function init() {
 		define(
 			'SAFECSS_USE_ACE',
 			! jetpack_is_mobile() &&
-			! Jetpack_User_Agent_Info::is_ipad() &&
+			! User_Agent_Info::is_ipad() &&
 			/**
 			 * Should the Custom CSS module use ACE to process CSS.
 			 * @see https://ace.c9.io/
diff --git a/modules/infinite-scroll/themes/twentyfourteen.php b/modules/infinite-scroll/themes/twentyfourteen.php
index 54a1fbc8f0402..c9710abdbf5f5 100644
--- a/modules/infinite-scroll/themes/twentyfourteen.php
+++ b/modules/infinite-scroll/themes/twentyfourteen.php
@@ -5,6 +5,8 @@
  * Register support for Twenty Fourteen.
  */
 
+use Automattic\Jetpack\Device_Detection\User_Agent_Info;
+
 /**
  * Add theme support for infinite scroll
  */
@@ -27,7 +29,7 @@ function jetpack_twentyfourteen_infinite_scroll_init() {
  */
 function jetpack_twentyfourteen_has_footer_widgets() {
 	if ( function_exists( 'jetpack_is_mobile' ) ) {
-		if ( ( Jetpack_User_Agent_Info::is_ipad() && is_active_sidebar( 'sidebar-1' ) )
+		if ( ( User_Agent_Info::is_ipad() && is_active_sidebar( 'sidebar-1' ) )
 			|| ( jetpack_is_mobile( '', true ) && ( is_active_sidebar( 'sidebar-1' ) || is_active_sidebar( 'sidebar-2' ) ) )
 			|| is_active_sidebar( 'sidebar-3' ) )
 
diff --git a/modules/masterbar/masterbar.php b/modules/masterbar/masterbar.php
index 6c46d5bbdacc4..2d63e9c1a60f7 100644
--- a/modules/masterbar/masterbar.php
+++ b/modules/masterbar/masterbar.php
@@ -5,6 +5,7 @@
 use Automattic\Jetpack\Connection\Manager as Connection_Manager;
 use Automattic\Jetpack\Redirect;
 use Automattic\Jetpack\Scan\Admin_Bar_Notice;
+use Automattic\Jetpack\Device_Detection\User_Agent_Info;
 
 require_once dirname( __FILE__ ) . '/rtl-admin-bar.php';
 
@@ -99,7 +100,7 @@ public function init() {
 		}
 
 		// Don't show the masterbar on WordPress mobile apps.
-		if ( Jetpack_User_Agent_Info::is_mobile_app() ) {
+		if ( User_Agent_Info::is_mobile_app() ) {
 			add_filter( 'show_admin_bar', '__return_false' );
 			return;
 		}
diff --git a/modules/sharedaddy/sharing-sources.php b/modules/sharedaddy/sharing-sources.php
index 2a681a9026b26..eaf7890238c4c 100644
--- a/modules/sharedaddy/sharing-sources.php
+++ b/modules/sharedaddy/sharing-sources.php
@@ -1,5 +1,7 @@
 <?php
 
+use Automattic\Jetpack\Device_Detection\User_Agent_Info;
+
 abstract class Sharing_Source {
 	public	  $button_style;
 	public	  $smart;
@@ -1858,7 +1860,7 @@ public function process_request( $post, array $post_data ) {
 		parent::process_request( $post, $post_data );
 
 		// Firefox for desktop doesn't handle the "api.whatsapp.com" URL properly, so use "web.whatsapp.com"
-		if ( Jetpack_User_Agent_Info::is_firefox_desktop() ) {
+		if ( User_Agent_Info::is_firefox_desktop() ) {
 			$url = 'https://web.whatsapp.com/send?text=';
 		} else {
 			$url = 'https://api.whatsapp.com/send?text=';
diff --git a/packages/device-detection/.gitattributes b/packages/device-detection/.gitattributes
new file mode 100644
index 0000000000000..f134439c12a02
--- /dev/null
+++ b/packages/device-detection/.gitattributes
@@ -0,0 +1,4 @@
+# Files not needed to be distributed in the package.
+.gitattributes   export-ignore
+phpunit.xml.dist export-ignore
+tests/           export-ignore
diff --git a/packages/device-detection/README.md b/packages/device-detection/README.md
new file mode 100644
index 0000000000000..c219add6675ac
--- /dev/null
+++ b/packages/device-detection/README.md
@@ -0,0 +1,75 @@
+# Jetpack Device Detection
+
+A method to detect device types, originates from `jetpack_is_mobile`.
+
+
+
+### Usage
+
+Retrieve device information.
+
+```php
+use Automattic\Jetpack\Device_Detection;
+
+$device_info = Device_Detection::get_info();
+
+/**
+ * array(
+ *  'is_phone'            => (bool) Whether the current device is a mobile phone.
+ *  'is_smartphone'       => (bool) Whether the current device is a smartphone.
+ *  'is_tablet'           => (bool) Whether the current device is a tablet device.
+ *  'is_handheld'         => (bool) Whether the current device is a handheld device.
+ *  'is_desktop'          => (bool) Whether the current device is a laptop / desktop device.
+ *  'platform'            => (string) Detected platform.
+ *  'is_phone_matched_ua' => (string) Matched UA.
+ * );
+ */
+```
+
+Detect any mobile phone.
+
+```php
+use Automattic\Jetpack\Device_Detection;
+
+$is_phone = Device_Detection::is_phone();
+```
+
+Detect a smartphone.
+
+```php
+use Automattic\Jetpack\Device_Detection;
+
+$is_smartphone = Device_Detection::is_smartphone();
+```
+
+Detect a dumbphone.
+
+```php
+use Automattic\Jetpack\Device_Detection;
+
+$is_dumbphone = Device_Detection::is_phone() && ! Device_Detection::is_smartphone();
+```
+
+Detect a tablet.
+
+```php
+use Automattic\Jetpack\Device_Detection;
+
+$is_tablet = Device_Detection::is_tablet();
+```
+
+Detect a desktop device.
+
+```php
+use Automattic\Jetpack\Device_Detection;
+
+$is_desktop = Device_Detection::is_desktop();
+```
+
+Detect any handheld device.
+
+```php
+use Automattic\Jetpack\Device_Detection;
+
+$is_handheld = Device_Detection::is_handheld();
+```
diff --git a/packages/device-detection/composer.json b/packages/device-detection/composer.json
new file mode 100644
index 0000000000000..de73a86a60665
--- /dev/null
+++ b/packages/device-detection/composer.json
@@ -0,0 +1,24 @@
+{
+	"name": "automattic/jetpack-device-detection",
+	"description": "A way to detect device types based on User-Agent header.",
+	"type": "library",
+	"license": "GPL-2.0-or-later",
+	"require": {},
+	"require-dev": {
+		"phpunit/phpunit": "^5.7 || ^6.5 || ^7.5",
+		"php-mock/php-mock": "^2.1"
+	},
+	"autoload": {
+		"classmap": [
+			"src/"
+		]
+	},
+	"scripts": {
+		"phpunit": [
+			"@composer install",
+			"./vendor/phpunit/phpunit/phpunit --colors=always"
+		]
+	},
+	"minimum-stability": "dev",
+	"prefer-stable": true
+}
diff --git a/packages/device-detection/phpunit.xml.dist b/packages/device-detection/phpunit.xml.dist
new file mode 100644
index 0000000000000..443d8a0ace772
--- /dev/null
+++ b/packages/device-detection/phpunit.xml.dist
@@ -0,0 +1,7 @@
+<phpunit bootstrap="tests/php/bootstrap.php" backupGlobals="false" colors="true">
+	<testsuites>
+		<testsuite name="main">
+			<directory prefix="test" suffix=".php">tests/php</directory>
+		</testsuite>
+	</testsuites>
+</phpunit>
diff --git a/packages/device-detection/src/class-device-detection.php b/packages/device-detection/src/class-device-detection.php
new file mode 100644
index 0000000000000..e518d10470c04
--- /dev/null
+++ b/packages/device-detection/src/class-device-detection.php
@@ -0,0 +1,211 @@
+<?php
+/**
+ * Device detection for Jetpack.
+ *
+ * @package automattic/jetpack-device-detection
+ */
+
+namespace Automattic\Jetpack;
+
+use Automattic\Jetpack\Device_Detection\User_Agent_Info;
+
+/**
+ * Class Device_Detection
+ *
+ * Determine if the current User Agent matches the passed $kind.
+ */
+class Device_Detection {
+
+	/**
+	 * Returns information about the current device accessing the page.
+	 *
+	 * @param string $ua (Optional) User-Agent string.
+	 *
+	 * @return array Device information.
+	 *
+	 * array(
+	 *  'is_phone'            => (bool) Whether the current device is a mobile phone.
+	 *  'is_smartphone'       => (bool) Whether the current device is a smartphone.
+	 *  'is_tablet'           => (bool) Whether the current device is a tablet device.
+	 *  'is_handheld'         => (bool) Whether the current device is a handheld device.
+	 *  'is_desktop'          => (bool) Whether the current device is a laptop / desktop device.
+	 *  'platform'            => (string) Detected platform.
+	 *  'is_phone_matched_ua' => (string) Matched UA.
+	 * );
+	 */
+	public static function get_info( $ua = '' ) {
+		$ua_info = new User_Agent_Info( $ua );
+
+		$info = array(
+			'is_phone'            => self::is_mobile( 'any', false, $ua_info ),
+			'is_phone_matched_ua' => self::is_mobile( 'any', true, $ua_info ),
+			'is_smartphone'       => self::is_mobile( 'smart', false, $ua_info ),
+			'is_tablet'           => $ua_info->is_tablet(),
+			'platform'            => $ua_info->get_platform(),
+		);
+
+		$info['is_handheld'] = $info['is_phone'] || $info['is_tablet'];
+		$info['is_desktop']  = ! $info['is_handheld'];
+
+		if ( function_exists( 'apply_filters' ) ) {
+			/**
+			 * Filter the value of Device_Detection::get_info.
+			 *
+			 * @since  8.7.0
+			 *
+			 * @param array           $info    Array of device information.
+			 * @param string          $ua      User agent string passed to Device_Detection::get_info.
+			 * @param User_Agent_Info $ua_info Instance of Automattic\Jetpack\Device_Detection\User_Agent_Info.
+			 */
+			$info = apply_filters( 'jetpack_device_detection_get_info', $info, $ua, $ua_info );
+		}
+		return $info;
+	}
+
+	/**
+	 * Detects phone devices.
+	 *
+	 * @param string $ua User-Agent string.
+	 *
+	 * @return bool
+	 */
+	public static function is_phone( $ua = '' ) {
+		$device_info = self::get_info( $ua );
+		return true === $device_info['is_phone'];
+	}
+
+	/**
+	 * Detects smartphone devices.
+	 *
+	 * @param string $ua User-Agent string.
+	 *
+	 * @return bool
+	 */
+	public static function is_smartphone( $ua = '' ) {
+		$device_info = self::get_info( $ua );
+		return true === $device_info['is_smartphone'];
+	}
+
+	/**
+	 * Detects tablet devices.
+	 *
+	 * @param string $ua User-Agent string.
+	 *
+	 * @return bool
+	 */
+	public static function is_tablet( $ua = '' ) {
+		$device_info = self::get_info( $ua );
+		return true === $device_info['is_tablet'];
+	}
+
+	/**
+	 * Detects desktop devices.
+	 *
+	 * @param string $ua User-Agent string.
+	 *
+	 * @return bool
+	 */
+	public static function is_desktop( $ua = '' ) {
+		$device_info = self::get_info( $ua );
+		return true === $device_info['is_desktop'];
+	}
+
+	/**
+	 * Detects handheld (i.e. phone + tablet) devices.
+	 *
+	 * @param string $ua User-Agent string.
+	 *
+	 * @return bool
+	 */
+	public static function is_handheld( $ua = '' ) {
+		$device_info = self::get_info( $ua );
+		return true === $device_info['is_handheld'];
+	}
+
+	/**
+	 * Determine if the current User Agent matches the passed $kind.
+	 *
+	 * @param string          $kind                 Category of mobile device to check for. Either: any, dumb, smart.
+	 * @param bool            $return_matched_agent Boolean indicating if the UA should be returned.
+	 * @param User_Agent_Info $ua_info              Boolean indicating if the UA should be returned.
+	 *
+	 * @return bool|string Boolean indicating if current UA matches $kind. If `$return_matched_agent` is true, returns the UA string.
+	 */
+	private static function is_mobile( $kind = 'any', $return_matched_agent = false, $ua_info ) {
+		$kinds         = array(
+			'smart' => false,
+			'dumb'  => false,
+			'any'   => false,
+		);
+		$first_run     = true;
+		$matched_agent = '';
+
+		// If an invalid kind is passed in, reset it to default.
+		if ( ! isset( $kinds[ $kind ] ) ) {
+				$kind = 'any';
+		}
+
+		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) || strpos( strtolower( $_SERVER['HTTP_USER_AGENT'] ), 'ipad' ) ) {
+			return false;
+		}
+
+		// Remove Samsung Galaxy tablets (SCH-I800) from being mobile devices.
+		if ( strpos( strtolower( $_SERVER['HTTP_USER_AGENT'] ), 'sch-i800' ) ) {
+			return false;
+		}
+
+		if ( $ua_info->is_android_tablet() && false === $ua_info->is_kindle_touch() ) {
+			return false;
+		}
+
+		if ( $ua_info->is_blackberry_tablet() ) {
+			return false;
+		}
+
+		if ( $first_run ) {
+			$first_run = false;
+
+			// checks for iPhoneTier devices & RichCSS devices.
+			if ( $ua_info->isTierIphone() || $ua_info->isTierRichCSS() ) {
+				$kinds['smart'] = true;
+				$matched_agent  = $ua_info->matched_agent;
+			}
+
+			if ( ! $kinds['smart'] ) {
+				// if smart, we are not dumb so no need to check.
+				$dumb_agents = $ua_info->dumb_agents;
+				$agent       = strtolower( $_SERVER['HTTP_USER_AGENT'] );
+
+				foreach ( $dumb_agents as $dumb_agent ) {
+					if ( false !== strpos( $agent, $dumb_agent ) ) {
+						$kinds['dumb'] = true;
+						$matched_agent = $dumb_agent;
+
+						break;
+					}
+				}
+
+				if ( ! $kinds['dumb'] ) {
+					if ( isset( $_SERVER['HTTP_X_WAP_PROFILE'] ) ) {
+						$kinds['dumb'] = true;
+						$matched_agent = 'http_x_wap_profile';
+					} elseif ( isset( $_SERVER['HTTP_ACCEPT'] ) && ( preg_match( '/wap\.|\.wap/i', $_SERVER['HTTP_ACCEPT'] ) || false !== strpos( strtolower( $_SERVER['HTTP_ACCEPT'] ), 'application/vnd.wap.xhtml+xml' ) ) ) {
+						$kinds['dumb'] = true;
+						$matched_agent = 'vnd.wap.xhtml+xml';
+					}
+				}
+			}
+
+			if ( $kinds['dumb'] || $kinds['smart'] ) {
+				$kinds['any'] = true;
+			}
+		}
+
+		$value = $kinds[ $kind ];
+
+		if ( $return_matched_agent ) {
+			$value = $matched_agent;
+		}
+		return $value;
+	}
+}
diff --git a/packages/device-detection/src/class-user-agent-info.php b/packages/device-detection/src/class-user-agent-info.php
new file mode 100644
index 0000000000000..9b2ca7b1bac9f
--- /dev/null
+++ b/packages/device-detection/src/class-user-agent-info.php
@@ -0,0 +1,1593 @@
+<?php
+/**
+ * User agent detection for Jetpack.
+ *
+ * @package automattic/jetpack-device-detection
+ *
+ * We don't want to rename public members.
+ * @phpcs:disable WordPress.NamingConventions.ValidVariableName.UsedPropertyNotSnakeCase
+ * @phpcs:disable WordPress.NamingConventions.ValidVariableName.VariableNotSnakeCase
+ * @phpcs:disable WordPress.NamingConventions.ValidVariableName.PropertyNotSnakeCase
+ * @phpcs:disable WordPress.NamingConventions.ValidFunctionName.MethodNameInvalid
+ */
+
+namespace Automattic\Jetpack\Device_Detection;
+
+/**
+ * A class providing device properties detection.
+ */
+class User_Agent_Info {
+
+	/**
+	 * Provided or fetched User-Agent string.
+	 *
+	 * @var string
+	 */
+	public $useragent;
+
+	/**
+	 * A device group matched user agent, e.g. 'iphone'.
+	 *
+	 * @var string
+	 */
+	public $matched_agent;
+
+	/**
+	 * Stores whether is the iPhone tier of devices.
+	 *
+	 * @var bool
+	 */
+	public $isTierIphone;
+
+	/**
+	 * Stores whether the device can probably support Rich CSS, but JavaScript (jQuery) support is not assumed.
+	 *
+	 * @var bool
+	 */
+	public $isTierRichCss;
+
+	/**
+	 * Stores whether it is another mobile device, which cannot be assumed to support CSS or JS (eg, older BlackBerry, RAZR)
+	 *
+	 * @var bool
+	 */
+	public $isTierGenericMobile;
+
+	/**
+	 * Stores the device platform name
+	 *
+	 * @var null|string
+	 */
+	private $platform             = null;
+	const PLATFORM_WINDOWS        = 'windows';
+	const PLATFORM_IPHONE         = 'iphone';
+	const PLATFORM_IPOD           = 'ipod';
+	const PLATFORM_IPAD           = 'ipad';
+	const PLATFORM_BLACKBERRY     = 'blackberry';
+	const PLATFORM_BLACKBERRY_10  = 'blackberry_10';
+	const PLATFORM_SYMBIAN        = 'symbian_series60';
+	const PLATFORM_SYMBIAN_S40    = 'symbian_series40';
+	const PLATFORM_J2ME_MIDP      = 'j2me_midp';
+	const PLATFORM_ANDROID        = 'android';
+	const PLATFORM_ANDROID_TABLET = 'android_tablet';
+	const PLATFORM_FIREFOX_OS     = 'firefoxOS';
+
+	/**
+	 * A list of dumb-phone user agent parts.
+	 *
+	 * @var array
+	 */
+	public $dumb_agents = array(
+		'nokia',
+		'blackberry',
+		'philips',
+		'samsung',
+		'sanyo',
+		'sony',
+		'panasonic',
+		'webos',
+		'ericsson',
+		'alcatel',
+		'palm',
+		'windows ce',
+		'opera mini',
+		'series60',
+		'series40',
+		'au-mic,',
+		'audiovox',
+		'avantgo',
+		'blazer',
+		'danger',
+		'docomo',
+		'epoc',
+		'ericy',
+		'i-mode',
+		'ipaq',
+		'midp-',
+		'mot-',
+		'netfront',
+		'nitro',
+		'palmsource',
+		'pocketpc',
+		'portalmmm',
+		'rover',
+		'sie-',
+		'symbian',
+		'cldc-',
+		'j2me',
+		'smartphone',
+		'up.browser',
+		'up.link',
+		'up.link',
+		'vodafone/',
+		'wap1.',
+		'wap2.',
+		'mobile',
+		'googlebot-mobile',
+	);
+
+
+	/**
+	 * The constructor.
+	 *
+	 * @param string $ua (Optional) User agent.
+	 */
+	public function __construct( $ua = '' ) {
+		if ( $ua ) {
+			$this->useragent = $ua;
+		} else {
+			if ( ! empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
+				$this->useragent = strtolower( $_SERVER['HTTP_USER_AGENT'] );
+			}
+		}
+	}
+
+	/**
+	 * This method detects the mobile User Agent name.
+	 *
+	 * @return string The matched User Agent name, false otherwise.
+	 */
+	public function get_mobile_user_agent_name() {
+		if ( $this->is_chrome_for_iOS() ) { // Keep this check before the safari rule.
+			return 'chrome-for-ios';
+		} elseif ( $this->is_iphone_or_ipod( 'iphone-safari' ) ) {
+			return 'iphone';
+		} elseif ( $this->is_ipad( 'ipad-safari' ) ) {
+			return 'ipad';
+		} elseif ( $this->is_android_tablet() ) { // Keep this check before the android rule.
+			return 'android_tablet';
+		} elseif ( $this->is_android() ) {
+			return 'android';
+		} elseif ( $this->is_blackberry_10() ) {
+			return 'blackberry_10';
+		} elseif ( $this->is_blackbeberry() ) {
+			return 'blackberry';
+		} elseif ( $this->is_WindowsPhone7() ) {
+			return 'win7';
+		} elseif ( $this->is_windows_phone_8() ) {
+			return 'winphone8';
+		} elseif ( $this->is_opera_mini() ) {
+			return 'opera-mini';
+		} elseif ( $this->is_opera_mini_dumb() ) {
+			return 'opera-mini-dumb';
+		} elseif ( $this->is_opera_mobile() ) {
+			return 'opera-mobi';
+		} elseif ( $this->is_blackberry_tablet() ) {
+			return 'blackberry_tablet';
+		} elseif ( $this->is_kindle_fire() ) {
+			return 'kindle-fire';
+		} elseif ( $this->is_PalmWebOS() ) {
+			return 'webos';
+		} elseif ( $this->is_S60_OSSBrowser() ) {
+			return 'series60';
+		} elseif ( $this->is_firefox_os() ) {
+			return 'firefoxOS';
+		} elseif ( $this->is_firefox_mobile() ) {
+			return 'firefox_mobile';
+		} elseif ( $this->is_MaemoTablet() ) {
+			return 'maemo';
+		} elseif ( $this->is_MeeGo() ) {
+			return 'meego';
+		} elseif ( $this->is_TouchPad() ) {
+			return 'hp_tablet';
+		} elseif ( $this->is_facebook_for_iphone() ) {
+			return 'facebook-for-iphone';
+		} elseif ( $this->is_facebook_for_ipad() ) {
+			return 'facebook-for-ipad';
+		} elseif ( $this->is_twitter_for_iphone() ) {
+			return 'twitter-for-iphone';
+		} elseif ( $this->is_twitter_for_ipad() ) {
+			return 'twitter-for-ipad';
+		} elseif ( $this->is_wordpress_for_ios() ) {
+			return 'ios-app';
+		} elseif ( $this->is_iphone_or_ipod( 'iphone-not-safari' ) ) {
+			return 'iphone-unknown';
+		} elseif ( $this->is_ipad( 'ipad-not-safari' ) ) {
+			return 'ipad-unknown';
+		} elseif ( $this->is_Nintendo_3DS() ) {
+			return 'nintendo-3ds';
+		} else {
+			$agent       = strtolower( $_SERVER['HTTP_USER_AGENT'] );
+			$dumb_agents = $this->dumb_agents;
+			foreach ( $dumb_agents as $dumb_agent ) {
+				if ( false !== strpos( $agent, $dumb_agent ) ) {
+					return $dumb_agent;
+				}
+			}
+		}
+
+		return false;
+	}
+
+	/**
+	 * This method detects the mobile device's platform. All return strings are from the class constants.
+	 * Note that this function returns the platform name, not the UA name/type. You should use a different function
+	 * if you need to test the UA capabilites.
+	 *
+	 * @return string Name of the platform, false otherwise.
+	 */
+	public function get_platform() {
+		if ( isset( $this->platform ) ) {
+				return $this->platform;
+		}
+
+		if ( strpos( $this->useragent, 'windows phone' ) !== false ) {
+				$this->platform = self::PLATFORM_WINDOWS;
+		} elseif ( strpos( $this->useragent, 'windows ce' ) !== false ) {
+			$this->platform = self::PLATFORM_WINDOWS;
+		} elseif ( strpos( $this->useragent, 'ipad' ) !== false ) {
+			$this->platform = self::PLATFORM_IPAD;
+		} elseif ( strpos( $this->useragent, 'ipod' ) !== false ) {
+			$this->platform = self::PLATFORM_IPOD;
+		} elseif ( strpos( $this->useragent, 'iphone' ) !== false ) {
+			$this->platform = self::PLATFORM_IPHONE;
+		} elseif ( strpos( $this->useragent, 'android' ) !== false ) {
+			if ( $this->is_android_tablet() ) {
+				$this->platform = self::PLATFORM_ANDROID_TABLET;
+			} else {
+				$this->platform = self::PLATFORM_ANDROID;
+			}
+		} elseif ( $this->is_kindle_fire() ) {
+			$this->platform = self::PLATFORM_ANDROID_TABLET;
+		} elseif ( $this->is_blackberry_10() ) {
+			$this->platform = self::PLATFORM_BLACKBERRY_10;
+		} elseif ( strpos( $this->useragent, 'blackberry' ) !== false ) {
+			$this->platform = self::PLATFORM_BLACKBERRY;
+		} elseif ( $this->is_blackberry_tablet() ) {
+			$this->platform = self::PLATFORM_BLACKBERRY;
+		} elseif ( $this->is_symbian_platform() ) {
+			$this->platform = self::PLATFORM_SYMBIAN;
+		} elseif ( $this->is_symbian_s40_platform() ) {
+			$this->platform = self::PLATFORM_SYMBIAN_S40;
+		} elseif ( $this->is_J2ME_platform() ) {
+			$this->platform = self::PLATFORM_J2ME_MIDP;
+		} elseif ( $this->is_firefox_os() ) {
+			$this->platform = self::PLATFORM_FIREFOX_OS;
+		} else {
+			$this->platform = false;
+		}
+
+		return $this->platform;
+	}
+
+	/**
+	 * This method detects for UA which can display iPhone-optimized web content.
+	 * Includes iPhone, iPod Touch, Android, WebOS, Fennec (Firefox mobile), etc.
+	 */
+	public function isTierIphone() {
+		if ( isset( $this->isTierIphone ) ) {
+			return $this->isTierIphone;
+		}
+		if ( $this->is_iphoneOrIpod() ) {
+			$this->matched_agent       = 'iphone';
+			$this->isTierIphone        = true;
+			$this->isTierRichCss       = false;
+			$this->isTierGenericMobile = false;
+		} elseif ( $this->is_android() ) {
+			$this->matched_agent       = 'android';
+			$this->isTierIphone        = true;
+			$this->isTierRichCss       = false;
+			$this->isTierGenericMobile = false;
+		} elseif ( $this->is_windows_phone_8() ) {
+			$this->matched_agent       = 'winphone8';
+			$this->isTierIphone        = true;
+			$this->isTierRichCss       = false;
+			$this->isTierGenericMobile = false;
+		} elseif ( $this->is_WindowsPhone7() ) {
+			$this->matched_agent       = 'win7';
+			$this->isTierIphone        = true;
+			$this->isTierRichCss       = false;
+			$this->isTierGenericMobile = false;
+		} elseif ( $this->is_blackberry_10() ) {
+			$this->matched_agent       = 'blackberry-10';
+			$this->isTierIphone        = true;
+			$this->isTierRichCss       = false;
+			$this->isTierGenericMobile = false;
+		} elseif ( $this->is_blackbeberry() && 'blackberry-webkit' === $this->detect_blackberry_browser_version() ) {
+			$this->matched_agent       = 'blackberry-webkit';
+			$this->isTierIphone        = true;
+			$this->isTierRichCss       = false;
+			$this->isTierGenericMobile = false;
+		} elseif ( $this->is_blackberry_tablet() ) {
+			$this->matched_agent       = 'blackberry_tablet';
+			$this->isTierIphone        = true;
+			$this->isTierRichCss       = false;
+			$this->isTierGenericMobile = false;
+		} elseif ( $this->is_PalmWebOS() ) {
+			$this->matched_agent       = 'webos';
+			$this->isTierIphone        = true;
+			$this->isTierRichCss       = false;
+			$this->isTierGenericMobile = false;
+		} elseif ( $this->is_TouchPad() ) {
+			$this->matched_agent       = 'hp_tablet';
+			$this->isTierIphone        = true;
+			$this->isTierRichCss       = false;
+			$this->isTierGenericMobile = false;
+		} elseif ( $this->is_firefox_os() ) {
+			$this->matched_agent       = 'firefoxOS';
+			$this->isTierIphone        = true;
+			$this->isTierRichCss       = false;
+			$this->isTierGenericMobile = false;
+		} elseif ( $this->is_firefox_mobile() ) {
+			$this->matched_agent       = 'fennec';
+			$this->isTierIphone        = true;
+			$this->isTierRichCss       = false;
+			$this->isTierGenericMobile = false;
+		} elseif ( $this->is_opera_mobile() ) {
+			$this->matched_agent       = 'opera-mobi';
+			$this->isTierIphone        = true;
+			$this->isTierRichCss       = false;
+			$this->isTierGenericMobile = false;
+		} elseif ( $this->is_MaemoTablet() ) {
+			$this->matched_agent       = 'maemo';
+			$this->isTierIphone        = true;
+			$this->isTierRichCss       = false;
+			$this->isTierGenericMobile = false;
+		} elseif ( $this->is_MeeGo() ) {
+			$this->matched_agent       = 'meego';
+			$this->isTierIphone        = true;
+			$this->isTierRichCss       = false;
+			$this->isTierGenericMobile = false;
+		} elseif ( $this->is_kindle_touch() ) {
+			$this->matched_agent       = 'kindle-touch';
+			$this->isTierIphone        = true;
+			$this->isTierRichCss       = false;
+			$this->isTierGenericMobile = false;
+		} elseif ( $this->is_Nintendo_3DS() ) {
+			$this->matched_agent       = 'nintendo-3ds';
+			$this->isTierIphone        = true;
+			$this->isTierRichCss       = false;
+			$this->isTierGenericMobile = false;
+		} else {
+			$this->isTierIphone = false;
+		}
+		return $this->isTierIphone;
+	}
+
+	/**
+	 * This method detects for UA which are likely to be capable
+	 * but may not necessarily support JavaScript.
+	 * Excludes all iPhone Tier UA.
+	 */
+	public function isTierRichCss() {
+		if ( isset( $this->isTierRichCss ) ) {
+			return $this->isTierRichCss;
+		}
+		if ( $this->isTierIphone() ) {
+			return false;
+		}
+
+		// The following devices are explicitly ok.
+		if ( $this->is_S60_OSSBrowser() ) {
+			$this->matched_agent       = 'series60';
+			$this->isTierIphone        = false;
+			$this->isTierRichCss       = true;
+			$this->isTierGenericMobile = false;
+		} elseif ( $this->is_opera_mini() ) {
+			$this->matched_agent       = 'opera-mini';
+			$this->isTierIphone        = false;
+			$this->isTierRichCss       = true;
+			$this->isTierGenericMobile = false;
+		} elseif ( $this->is_blackbeberry() ) {
+			$detectedDevice = $this->detect_blackberry_browser_version();
+			if (
+				'blackberry-5' === $detectedDevice
+				|| 'blackberry-4.7' === $detectedDevice
+				|| 'blackberry-4.6' === $detectedDevice
+			) {
+				$this->matched_agent       = $detectedDevice;
+				$this->isTierIphone        = false;
+				$this->isTierRichCss       = true;
+				$this->isTierGenericMobile = false;
+			}
+		} else {
+			$this->isTierRichCss = false;
+		}
+
+		return $this->isTierRichCss;
+	}
+
+	/**
+	 * Detects if the user is using a tablet.
+	 * props Corey Gilmore, BGR.com
+	 *
+	 * @return bool
+	 */
+	public function is_tablet() {
+		return ( 0 // Never true, but makes it easier to manage our list of tablet conditions.
+				|| self::is_ipad()
+				|| self::is_android_tablet()
+				|| self::is_blackberry_tablet()
+				|| self::is_kindle_fire()
+				|| self::is_MaemoTablet()
+				|| self::is_TouchPad()
+		);
+	}
+
+	/**
+	 *  Detects if the current UA is the default iPhone or iPod Touch Browser.
+	 *
+	 *  DEPRECATED: use is_iphone_or_ipod
+	 */
+	public function is_iphoneOrIpod() {
+		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
+			return false;
+		}
+
+		$ua = strtolower( $_SERVER['HTTP_USER_AGENT'] );
+		if ( ( strpos( $ua, 'iphone' ) !== false ) || ( strpos( $ua, 'ipod' ) !== false ) ) {
+			if ( self::is_opera_mini() || self::is_opera_mobile() || self::is_firefox_mobile() ) {
+				return false;
+			} else {
+				return true;
+			}
+		} else {
+			return false;
+		}
+	}
+
+
+	/**
+	 *  Detects if the current UA is iPhone Mobile Safari or another iPhone or iPod Touch Browser.
+	 *
+	 *  They type can check for any iPhone, an iPhone using Safari, or an iPhone using something other than Safari.
+	 *
+	 *  Note: If you want to check for Opera mini, Opera mobile or Firefox mobile (or any 3rd party iPhone browser),
+	 *  you should put the check condition before the check for 'iphone-any' or 'iphone-not-safari'.
+	 *  Otherwise those browsers will be 'catched' by the iphone string.
+	 *
+	 * @param string $type Type of iPhone detection.
+	 */
+	public static function is_iphone_or_ipod( $type = 'iphone-any' ) {
+		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
+			return false;
+		}
+
+		$ua        = strtolower( $_SERVER['HTTP_USER_AGENT'] );
+		$is_iphone = ( strpos( $ua, 'iphone' ) !== false ) || ( strpos( $ua, 'ipod' ) !== false );
+		$is_safari = ( false !== strpos( $ua, 'safari' ) );
+
+		if ( 'iphone-safari' === $type ) {
+			return $is_iphone && $is_safari;
+		} elseif ( 'iphone-not-safari' === $type ) {
+			return $is_iphone && ! $is_safari;
+		} else {
+			return $is_iphone;
+		}
+	}
+
+
+	/**
+	 *  Detects if the current UA is Chrome for iOS
+	 *
+	 *  The User-Agent string in Chrome for iOS is the same as the Mobile Safari User-Agent, with CriOS/<ChromeRevision> instead of Version/<VersionNum>.
+	 *  - Mozilla/5.0 (iPhone; U; CPU iPhone OS 5_1_1 like Mac OS X; en) AppleWebKit/534.46.0 (KHTML, like Gecko) CriOS/19.0.1084.60 Mobile/9B206 Safari/7534.48.3
+	 */
+	public static function is_chrome_for_iOS() {
+		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
+			return false;
+		}
+
+		if ( self::is_iphone_or_ipod( 'iphone-safari' ) === false ) {
+			return false;
+		}
+
+		$ua = strtolower( $_SERVER['HTTP_USER_AGENT'] );
+
+		if ( strpos( $ua, 'crios/' ) !== false ) {
+			return true;
+		} else {
+			return false;
+		}
+	}
+
+
+	/**
+	 *  Detects if the current UA is Twitter for iPhone
+	 *
+	 * Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_3_5 like Mac OS X; nb-no) AppleWebKit/533.17.9 (KHTML, like Gecko) Mobile/8L1 Twitter for iPhone
+	 * Mozilla/5.0 (iPhone; CPU iPhone OS 5_1_1 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Mobile/9B206 Twitter for iPhone
+	 */
+	public static function is_twitter_for_iphone() {
+		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
+			return false;
+		}
+
+		$ua = strtolower( $_SERVER['HTTP_USER_AGENT'] );
+
+		if ( strpos( $ua, 'ipad' ) !== false ) {
+			return false;
+		}
+
+		if ( strpos( $ua, 'twitter for iphone' ) !== false ) {
+			return true;
+		} else {
+			return false;
+		}
+	}
+
+	/**
+	 * Detects if the current UA is Twitter for iPad
+	 *
+	 * Old version 4.X - Mozilla/5.0 (iPad; U; CPU OS 4_3_5 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Mobile/8L1 Twitter for iPad
+	 * Ver 5.0 or Higher - Mozilla/5.0 (iPad; CPU OS 5_1_1 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Mobile/9B206 Twitter for iPhone
+	 */
+	public static function is_twitter_for_ipad() {
+		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
+			return false;
+		}
+
+		$ua = strtolower( $_SERVER['HTTP_USER_AGENT'] );
+
+		if ( strpos( $ua, 'twitter for ipad' ) !== false ) {
+			return true;
+		} elseif ( strpos( $ua, 'ipad' ) !== false && strpos( $ua, 'twitter for iphone' ) !== false ) {
+			return true;
+		} else {
+			return false;
+		}
+	}
+
+	/**
+	 * Detects if the current UA is Facebook for iPhone
+	 * - Facebook 4020.0 (iPhone; iPhone OS 5.0.1; fr_FR)
+	 * - Mozilla/5.0 (iPhone; U; CPU iPhone OS 5_0 like Mac OS X; en_US) AppleWebKit (KHTML, like Gecko) Mobile [FBAN/FBForIPhone;FBAV/4.0.2;FBBV/4020.0;FBDV/iPhone3,1;FBMD/iPhone;FBSN/iPhone OS;FBSV/5.0;FBSS/2; FBCR/O2;FBID/phone;FBLC/en_US;FBSF/2.0]
+	 * - Mozilla/5.0 (iPhone; CPU iPhone OS 5_1_1 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Mobile/9B206 [FBAN/FBIOS;FBAV/5.0;FBBV/47423;FBDV/iPhone3,1;FBMD/iPhone;FBSN/iPhone OS;FBSV/5.1.1;FBSS/2; FBCR/3ITA;FBID/phone;FBLC/en_US]
+	 */
+	public static function is_facebook_for_iphone() {
+		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
+			return false;
+		}
+
+		$ua = strtolower( $_SERVER['HTTP_USER_AGENT'] );
+
+		if ( false === strpos( $ua, 'iphone' ) ) {
+			return false;
+		}
+
+		if ( false !== strpos( $ua, 'facebook' ) && false === strpos( $ua, 'ipad' ) ) {
+			return true;
+		} elseif ( false !== strpos( $ua, 'fbforiphone' ) && false === strpos( $ua, 'tablet' ) ) {
+			return true;
+		} elseif ( false !== strpos( $ua, 'fban/fbios;' ) && false === strpos( $ua, 'tablet' ) ) { // FB app v5.0 or higher.
+			return true;
+		} else {
+			return false;
+		}
+	}
+
+	/**
+	 * Detects if the current UA is Facebook for iPad
+	 * - Facebook 4020.0 (iPad; iPhone OS 5.0.1; en_US)
+	 * - Mozilla/5.0 (iPad; U; CPU iPhone OS 5_0 like Mac OS X; en_US) AppleWebKit (KHTML, like Gecko) Mobile [FBAN/FBForIPhone;FBAV/4.0.2;FBBV/4020.0;FBDV/iPad2,1;FBMD/iPad;FBSN/iPhone OS;FBSV/5.0;FBSS/1; FBCR/;FBID/tablet;FBLC/en_US;FBSF/1.0]
+	 * - Mozilla/5.0 (iPad; CPU OS 6_0 like Mac OS X) AppleWebKit/536.26 (KHTML, like Gecko) Mobile/10A403 [FBAN/FBIOS;FBAV/5.0;FBBV/47423;FBDV/iPad2,1;FBMD/iPad;FBSN/iPhone OS;FBSV/6.0;FBSS/1; FBCR/;FBID/tablet;FBLC/en_US]
+	 */
+	public static function is_facebook_for_ipad() {
+		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
+			return false;
+		}
+
+		$ua = strtolower( $_SERVER['HTTP_USER_AGENT'] );
+
+		if ( false === strpos( $ua, 'ipad' ) ) {
+			return false;
+		}
+
+		if ( false !== strpos( $ua, 'facebook' ) || false !== strpos( $ua, 'fbforiphone' ) || false !== strpos( $ua, 'fban/fbios;' ) ) {
+			return true;
+		} else {
+			return false;
+		}
+	}
+
+	/**
+	 *  Detects if the current UA is WordPress for iOS
+	 */
+	public static function is_wordpress_for_ios() {
+		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
+			return false;
+		}
+
+		$ua = strtolower( $_SERVER['HTTP_USER_AGENT'] );
+		if ( false !== strpos( $ua, 'wp-iphone' ) ) {
+			return true;
+		} else {
+			return false;
+		}
+	}
+
+	/**
+	 * Detects if the current device is an iPad.
+	 * They type can check for any iPad, an iPad using Safari, or an iPad using something other than Safari.
+	 *
+	 * Note: If you want to check for Opera mini, Opera mobile or Firefox mobile (or any 3rd party iPad browser),
+	 * you should put the check condition before the check for 'iphone-any' or 'iphone-not-safari'.
+	 * Otherwise those browsers will be 'catched' by the ipad string.
+	 *
+	 * @param string $type iPad type.
+	 */
+	public static function is_ipad( $type = 'ipad-any' ) {
+
+		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
+			return false;
+		}
+
+		$ua = strtolower( $_SERVER['HTTP_USER_AGENT'] );
+
+		$is_ipad   = ( false !== strpos( $ua, 'ipad' ) );
+		$is_safari = ( false !== strpos( $ua, 'safari' ) );
+
+		if ( 'ipad-safari' === $type ) {
+			return $is_ipad && $is_safari;
+		} elseif ( 'ipad-not-safari' === $type ) {
+			return $is_ipad && ! $is_safari;
+		} else {
+			return $is_ipad;
+		}
+	}
+
+	/**
+	 * Detects if the current browser is Firefox Mobile (Fennec)
+	 *
+	 * See http://www.useragentstring.com/pages/Fennec/
+	 * Mozilla/5.0 (Windows NT 6.1; WOW64; rv:2.1.1) Gecko/20110415 Firefox/4.0.2pre Fennec/4.0.1
+	 * Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1b2pre) Gecko/20081015 Fennec/1.0a1
+	 */
+	public static function is_firefox_mobile() {
+
+		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
+			return false;
+		}
+
+		$ua = strtolower( $_SERVER['HTTP_USER_AGENT'] );
+
+		if ( strpos( $ua, 'fennec' ) !== false ) {
+			return true;
+		} else {
+			return false;
+		}
+	}
+
+	/**
+	 * Detects if the current browser is Firefox for desktop
+	 *
+	 * See https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/User-Agent/Firefox
+	 * Mozilla/5.0 (platform; rv:geckoversion) Gecko/geckotrail Firefox/firefoxversion
+	 * The platform section will include 'Mobile' for phones and 'Tablet' for tablets.
+	 */
+	public static function is_firefox_desktop() {
+
+		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
+			return false;
+		}
+
+		$ua = strtolower( $_SERVER['HTTP_USER_AGENT'] );
+
+		if ( false !== strpos( $ua, 'firefox' ) && false === strpos( $ua, 'mobile' ) && false === strpos( $ua, 'tablet' ) ) {
+			return true;
+		} else {
+			return false;
+		}
+	}
+
+	/**
+	 * Detects if the current browser is FirefoxOS Native browser
+	 *
+	 * Mozilla/5.0 (Mobile; rv:14.0) Gecko/14.0 Firefox/14.0
+	 */
+	public static function is_firefox_os() {
+
+		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
+			return false;
+		}
+
+		$ua = strtolower( $_SERVER['HTTP_USER_AGENT'] );
+
+		if ( strpos( $ua, 'mozilla' ) !== false && strpos( $ua, 'mobile' ) !== false && strpos( $ua, 'gecko' ) !== false && strpos( $ua, 'firefox' ) !== false ) {
+			return true;
+		} else {
+			return false;
+		}
+	}
+
+	/**
+	 * Detects if the current browser is Opera Mobile
+	 *
+	 * What is the difference between Opera Mobile and Opera Mini?
+	 * - Opera Mobile is a full Internet browser for mobile devices.
+	 * - Opera Mini always uses a transcoder to convert the page for a small display.
+	 * (it uses Opera advanced server compression technology to compress web content before it gets to a device.
+	 *  The rendering engine is on Opera's server.)
+	 *
+	 * Opera/9.80 (Windows NT 6.1; Opera Mobi/14316; U; en) Presto/2.7.81 Version/11.00"
+	 * Opera/9.50 (Nintendo DSi; Opera/507; U; en-US)
+	 */
+	public static function is_opera_mobile() {
+		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
+			return false;
+		}
+
+		$ua = strtolower( $_SERVER['HTTP_USER_AGENT'] );
+
+		if ( strpos( $ua, 'opera' ) !== false && strpos( $ua, 'mobi' ) !== false ) {
+			return true;
+		} elseif ( strpos( $ua, 'opera' ) !== false && strpos( $ua, 'nintendo dsi' ) !== false ) {
+			return true;
+		} else {
+			return false;
+		}
+	}
+
+
+	/**
+	 * Detects if the current browser is Opera Mini
+	 *
+	 * Opera/8.01 (J2ME/MIDP; Opera Mini/3.0.6306/1528; en; U; ssr)
+	 * Opera/9.80 (Android;Opera Mini/6.0.24212/24.746 U;en) Presto/2.5.25 Version/10.5454
+	 * Opera/9.80 (iPhone; Opera Mini/5.0.019802/18.738; U; en) Presto/2.4.15
+	 * Opera/9.80 (J2ME/iPhone;Opera Mini/5.0.019802/886; U; ja) Presto/2.4.15
+	 * Opera/9.80 (J2ME/iPhone;Opera Mini/5.0.019802/886; U; ja) Presto/2.4.15
+	 * Opera/9.80 (Series 60; Opera Mini/5.1.22783/23.334; U; en) Presto/2.5.25 Version/10.54
+	 * Opera/9.80 (BlackBerry; Opera Mini/5.1.22303/22.387; U; en) Presto/2.5.25 Version/10.54
+	 */
+	public static function is_opera_mini() {
+		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
+			return false;
+		}
+
+		$ua = strtolower( $_SERVER['HTTP_USER_AGENT'] );
+
+		if ( strpos( $ua, 'opera' ) !== false && strpos( $ua, 'mini' ) !== false ) {
+			return true;
+		} else {
+			return false;
+		}
+	}
+
+	/**
+	 * Detects if the current browser is Opera Mini, but not on a smart device OS(Android, iOS, etc)
+	 * Used to send users on dumb devices to m.wor
+	 */
+	public static function is_opera_mini_dumb() {
+		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
+			return false;
+		}
+		$ua = strtolower( $_SERVER['HTTP_USER_AGENT'] );
+
+		if ( self::is_opera_mini() ) {
+			if ( strpos( $ua, 'android' ) !== false || strpos( $ua, 'iphone' ) !== false || strpos( $ua, 'ipod' ) !== false
+			|| strpos( $ua, 'ipad' ) !== false || strpos( $ua, 'blackberry' ) !== false ) {
+				return false;
+			} else {
+				return true;
+			}
+		} else {
+			return false;
+		}
+	}
+
+	/**
+	 * Detects if the current browser is Opera Mobile or Mini.
+	 * DEPRECATED: use is_opera_mobile or is_opera_mini
+	 *
+	 * Opera Mini 5 Beta: Opera/9.80 (J2ME/MIDP; Opera Mini/5.0.15650/756; U; en) Presto/2.2.0
+	 * Opera Mini 8: Opera/8.01 (J2ME/MIDP; Opera Mini/3.0.6306/1528; en; U; ssr)
+	 */
+	public static function is_OperaMobile() {
+		_deprecated_function( __FUNCTION__, 'always', 'is_opera_mini() or is_opera_mobile()' );
+
+		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
+			return false;
+		}
+
+		$ua = strtolower( $_SERVER['HTTP_USER_AGENT'] );
+
+		if ( strpos( $ua, 'opera' ) !== false ) {
+			if ( ( strpos( $ua, 'mini' ) !== false ) || ( strpos( $ua, 'mobi' ) !== false ) ) {
+				return true;
+			} else {
+				return false;
+			}
+		} else {
+			return false;
+		}
+	}
+
+	/**
+	 * Detects if the current browser is a Windows Phone 7 device.
+	 * ex: Mozilla/4.0 (compatible; MSIE 7.0; Windows Phone OS 7.0; Trident/3.1; IEMobile/7.0; LG; GW910)
+	 */
+	public static function is_WindowsPhone7() {
+		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
+			return false;
+		}
+
+		$ua = strtolower( $_SERVER['HTTP_USER_AGENT'] );
+
+		if ( false === strpos( $ua, 'windows phone os 7' ) ) {
+			return false;
+		} else {
+			if ( self::is_opera_mini() || self::is_opera_mobile() || self::is_firefox_mobile() ) {
+				return false;
+			} else {
+				return true;
+			}
+		}
+	}
+
+	/**
+	 * Detects if the current browser is a Windows Phone 8 device.
+	 * ex: Mozilla/5.0 (compatible; MSIE 10.0; Windows Phone 8.0; Trident/6.0; ARM; Touch; IEMobile/10.0; <Manufacturer>; <Device> [;<Operator>])
+	 */
+	public static function is_windows_phone_8() {
+		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
+			return false;
+		}
+
+		$ua = strtolower( $_SERVER['HTTP_USER_AGENT'] );
+		if ( strpos( $ua, 'windows phone 8' ) === false ) {
+			return false;
+		} else {
+			return true;
+		}
+	}
+
+
+	/**
+	 * Detects if the current browser is on a Palm device running the new WebOS. This EXCLUDES TouchPad.
+	 *
+	 * Ex1: Mozilla/5.0 (webOS/1.4.0; U; en-US) AppleWebKit/532.2 (KHTML, like Gecko) Version/1.0 Safari/532.2 Pre/1.1
+	 * Ex2: Mozilla/5.0 (webOS/1.4.0; U; en-US) AppleWebKit/532.2 (KHTML, like Gecko) Version/1.0 Safari/532.2 Pixi/1.1
+	 */
+	public static function is_PalmWebOS() {
+		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
+			return false;
+		}
+
+		$ua = strtolower( $_SERVER['HTTP_USER_AGENT'] );
+
+		if ( false === strpos( $ua, 'webos' ) ) {
+			return false;
+		} else {
+			if ( self::is_opera_mini() || self::is_opera_mobile() || self::is_firefox_mobile() ) {
+				return false;
+			} else {
+				return true;
+			}
+		}
+	}
+
+	/**
+	 * Detects if the current browser is the HP TouchPad default browser. This excludes phones wt WebOS.
+	 *
+	 * TouchPad Emulator: Mozilla/5.0 (hp-desktop; Linux; hpwOS/2.0; U; it-IT) AppleWebKit/534.6 (KHTML, like Gecko) wOSBrowser/233.70 Safari/534.6 Desktop/1.0
+	 * TouchPad: Mozilla/5.0 (hp-tablet; Linux; hpwOS/3.0.0; U; en-US) AppleWebKit/534.6 (KHTML, like Gecko) wOSBrowser/233.70 Safari/534.6 TouchPad/1.0
+	 */
+	public static function is_TouchPad() {
+		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
+			return false;
+		}
+
+		$http_user_agent = strtolower( $_SERVER['HTTP_USER_AGENT'] );
+		if ( false !== strpos( $http_user_agent, 'hp-tablet' ) || false !== strpos( $http_user_agent, 'hpwos' ) || false !== strpos( $http_user_agent, 'touchpad' ) ) {
+			if ( self::is_opera_mini() || self::is_opera_mobile() || self::is_firefox_mobile() ) {
+				return false;
+			} else {
+				return true;
+			}
+		} else {
+			return false;
+		}
+	}
+
+
+	/**
+	 * Detects if the current browser is the Series 60 Open Source Browser.
+	 *
+	 * OSS Browser 3.2 on E75: Mozilla/5.0 (SymbianOS/9.3; U; Series60/3.2 NokiaE75-1/110.48.125 Profile/MIDP-2.1 Configuration/CLDC-1.1 ) AppleWebKit/413 (KHTML, like Gecko) Safari/413
+	 *
+	 * 7.0 Browser (Nokia 5800 XpressMusic (v21.0.025)) : Mozilla/5.0 (SymbianOS/9.4; U; Series60/5.0 Nokia5800d-1/21.0.025; Profile/MIDP-2.1 Configuration/CLDC-1.1 ) AppleWebKit/413 (KHTML, like Gecko) Safari/413
+	 *
+	 * Browser 7.1 (Nokia N97 (v12.0.024)) : Mozilla/5.0 (SymbianOS/9.4; Series60/5.0 NokiaN97-1/12.0.024; Profile/MIDP-2.1 Configuration/CLDC-1.1; en-us) AppleWebKit/525 (KHTML, like Gecko) BrowserNG/7.1.12344
+	 */
+	public static function is_S60_OSSBrowser() {
+
+		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
+			return false;
+		}
+
+		$agent = strtolower( $_SERVER['HTTP_USER_AGENT'] );
+		if ( self::is_opera_mini() || self::is_opera_mobile() || self::is_firefox_mobile() ) {
+			return false;
+		}
+
+		$pos_webkit = strpos( $agent, 'webkit' );
+		if ( false !== $pos_webkit ) {
+			// First, test for WebKit, then make sure it's either Symbian or S60.
+			if ( strpos( $agent, 'symbian' ) !== false || strpos( $agent, 'series60' ) !== false ) {
+					return true;
+			} else {
+				return false;
+			}
+		} elseif ( strpos( $agent, 'symbianos' ) !== false && strpos( $agent, 'series60' ) !== false ) {
+			return true;
+		} elseif ( strpos( $agent, 'nokia' ) !== false && strpos( $agent, 'series60' ) !== false ) {
+			return true;
+		}
+
+		return false;
+	}
+
+	/**
+	 * Detects if the device platform is the Symbian Series 60.
+	 */
+	public static function is_symbian_platform() {
+
+		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
+			return false;
+		}
+
+		$agent = strtolower( $_SERVER['HTTP_USER_AGENT'] );
+
+		$pos_webkit = strpos( $agent, 'webkit' );
+		if ( false !== $pos_webkit ) {
+			// First, test for WebKit, then make sure it's either Symbian or S60.
+			if ( strpos( $agent, 'symbian' ) !== false || strpos( $agent, 'series60' ) !== false ) {
+					return true;
+			} else {
+				return false;
+			}
+		} elseif ( strpos( $agent, 'symbianos' ) !== false && strpos( $agent, 'series60' ) !== false ) {
+			return true;
+		} elseif ( strpos( $agent, 'nokia' ) !== false && strpos( $agent, 'series60' ) !== false ) {
+			return true;
+		} elseif ( strpos( $agent, 'opera mini' ) !== false ) {
+			if ( strpos( $agent, 'symbianos' ) !== false || strpos( $agent, 'symbos' ) !== false || strpos( $agent, 'series 60' ) !== false ) {
+				return true;
+			}
+		}
+
+		return false;
+	}
+
+	/**
+	 * Detects if the device platform is the Symbian Series 40.
+	 * Nokia Browser for Series 40 is a proxy based browser, previously known as Ovi Browser.
+	 * This browser will report 'NokiaBrowser' in the header, however some older version will also report 'OviBrowser'.
+	 */
+	public static function is_symbian_s40_platform() {
+
+		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
+			return false;
+		}
+
+		$agent = strtolower( $_SERVER['HTTP_USER_AGENT'] );
+
+		if ( strpos( $agent, 'series40' ) !== false ) {
+			if ( strpos( $agent, 'nokia' ) !== false || strpos( $agent, 'ovibrowser' ) !== false || strpos( $agent, 'nokiabrowser' ) !== false ) {
+				return true;
+			}
+		}
+
+		return false;
+	}
+
+	/**
+	 * Returns if the device belongs to J2ME capable family.
+	 *
+	 * @return bool
+	 */
+	public static function is_J2ME_platform() {
+
+		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
+			return false;
+		}
+
+		$agent = strtolower( $_SERVER['HTTP_USER_AGENT'] );
+
+		if ( strpos( $agent, 'j2me/midp' ) !== false ) {
+			return true;
+		} elseif ( strpos( $agent, 'midp' ) !== false && strpos( $agent, 'cldc' ) ) {
+			return true;
+		}
+		return false;
+	}
+
+
+	/**
+	 * Detects if the current UA is on one of the Maemo-based Nokia Internet Tablets.
+	 */
+	public static function is_MaemoTablet() {
+
+		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
+			return false;
+		}
+
+		$agent = strtolower( $_SERVER['HTTP_USER_AGENT'] );
+
+		$pos_maemo = strpos( $agent, 'maemo' );
+		if ( false === $pos_maemo ) {
+			return false;
+		}
+
+		// Must be Linux + Tablet, or else it could be something else.
+		if ( strpos( $agent, 'tablet' ) !== false && strpos( $agent, 'linux' ) !== false ) {
+			if ( self::is_opera_mini() || self::is_opera_mobile() || self::is_firefox_mobile() ) {
+				return false;
+			} else {
+				return true;
+			}
+		} else {
+			return false;
+		}
+	}
+
+	/**
+	 * Detects if the current UA is a MeeGo device (Nokia Smartphone).
+	 */
+	public static function is_MeeGo() {
+
+		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
+			return false;
+		}
+
+		$ua = strtolower( $_SERVER['HTTP_USER_AGENT'] );
+
+		if ( false === strpos( $ua, 'meego' ) ) {
+			return false;
+		} else {
+			if ( self::is_opera_mini() || self::is_opera_mobile() || self::is_firefox_mobile() ) {
+				return false;
+			} else {
+				return true;
+			}
+		}
+	}
+
+
+	/**
+	 * The is_webkit() method can be used to check the User Agent for an webkit generic browser.
+	 */
+	public static function is_webkit() {
+
+		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
+			return false;
+		}
+
+		$agent = strtolower( $_SERVER['HTTP_USER_AGENT'] );
+
+		$pos_webkit = strpos( $agent, 'webkit' );
+
+		if ( false !== $pos_webkit ) {
+			return true;
+		} else {
+			return false;
+		}
+	}
+
+	/**
+	 * Detects if the current browser is the Native Android browser.
+	 *
+	 * @return boolean true if the browser is Android otherwise false
+	 */
+	public static function is_android() {
+		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
+			return false;
+		}
+
+		$agent       = strtolower( $_SERVER['HTTP_USER_AGENT'] );
+		$pos_android = strpos( $agent, 'android' );
+		if ( false !== $pos_android ) {
+			if ( self::is_opera_mini() || self::is_opera_mobile() || self::is_firefox_mobile() ) {
+				return false;
+			} else {
+				return true;
+			}
+		} else {
+			return false;
+		}
+	}
+
+
+	/**
+	 * Detects if the current browser is the Native Android Tablet browser.
+	 * Assumes 'Android' should be in the user agent, but not 'mobile'
+	 *
+	 * @return boolean true if the browser is Android and not 'mobile' otherwise false
+	 */
+	public static function is_android_tablet() {
+		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
+			return false;
+		}
+
+		$agent = strtolower( $_SERVER['HTTP_USER_AGENT'] );
+
+		$pos_android      = strpos( $agent, 'android' );
+		$pos_mobile       = strpos( $agent, 'mobile' );
+		$post_android_app = strpos( $agent, 'wp-android' );
+
+		if ( false !== $pos_android && false === $pos_mobile && false === $post_android_app ) {
+			if ( self::is_opera_mini() || self::is_opera_mobile() || self::is_firefox_mobile() ) {
+				return false;
+			} else {
+				return true;
+			}
+		} else {
+			return false;
+		}
+	}
+
+	/**
+	 * Detects if the current browser is the Kindle Fire Native browser.
+	 *
+	 * Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_3; en-us; Silk/1.1.0-84) AppleWebKit/533.16 (KHTML, like Gecko) Version/5.0 Safari/533.16 Silk-Accelerated=true
+	 * Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_3; en-us; Silk/1.1.0-84) AppleWebKit/533.16 (KHTML, like Gecko) Version/5.0 Safari/533.16 Silk-Accelerated=false
+	 *
+	 * @return boolean true if the browser is Kindle Fire Native browser otherwise false
+	 */
+	public static function is_kindle_fire() {
+		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
+			return false;
+		}
+
+		$agent        = strtolower( $_SERVER['HTTP_USER_AGENT'] );
+		$pos_silk     = strpos( $agent, 'silk/' );
+		$pos_silk_acc = strpos( $agent, 'silk-accelerated=' );
+		if ( false !== $pos_silk && false !== $pos_silk_acc ) {
+			return true;
+		} else {
+			return false;
+		}
+	}
+
+	/**
+	 * Detects if the current browser is the Kindle Touch Native browser
+	 *
+	 * Mozilla/5.0 (X11; U; Linux armv7l like Android; en-us) AppleWebKit/531.2+ (KHTML, like Gecko) Version/5.0 Safari/533.2+ Kindle/3.0+
+	 *
+	 * @return boolean true if the browser is Kindle monochrome Native browser otherwise false
+	 */
+	public static function is_kindle_touch() {
+		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
+			return false;
+		}
+		$agent            = strtolower( $_SERVER['HTTP_USER_AGENT'] );
+		$pos_kindle_touch = strpos( $agent, 'kindle/3.0+' );
+		if ( false !== $pos_kindle_touch && false === self::is_kindle_fire() ) {
+			return true;
+		} else {
+			return false;
+		}
+	}
+
+
+	/**
+	 * Detect if user agent is the WordPress.com Windows 8 app (used ONLY on the custom oauth stylesheet)
+	 */
+	public static function is_windows8_auth() {
+		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
+			return false;
+		}
+
+		$agent = strtolower( $_SERVER['HTTP_USER_AGENT'] );
+		$pos   = strpos( $agent, 'msauthhost' );
+		if ( false !== $pos ) {
+			return true;
+		} else {
+			return false;
+		}
+	}
+
+	/**
+	 * Detect if user agent is the WordPress.com Windows 8 app.
+	 */
+	public static function is_wordpress_for_win8() {
+		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
+			return false;
+		}
+
+		$agent = strtolower( $_SERVER['HTTP_USER_AGENT'] );
+		$pos   = strpos( $agent, 'wp-windows8' );
+		if ( false !== $pos ) {
+			return true;
+		} else {
+			return false;
+		}
+	}
+
+	/**
+	 * Detect if user agent is the WordPress.com Desktop app.
+	 */
+	public static function is_wordpress_desktop_app() {
+		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
+			return false;
+		}
+
+		$agent = strtolower( $_SERVER['HTTP_USER_AGENT'] );
+		$pos   = strpos( $agent, 'WordPressDesktop' );
+		if ( false !== $pos ) {
+			return true;
+		} else {
+			return false;
+		}
+	}
+
+	/**
+	 * The is_blackberry_tablet() method can be used to check the User Agent for a RIM blackberry tablet.
+	 * The user agent of the BlackBerry® Tablet OS follows a format similar to the following:
+	 * Mozilla/5.0 (PlayBook; U; RIM Tablet OS 1.0.0; en-US) AppleWebKit/534.8+ (KHTML, like Gecko) Version/0.0.1 Safari/534.8+
+	 */
+	public static function is_blackberry_tablet() {
+
+		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
+			return false;
+		}
+
+		$agent          = strtolower( $_SERVER['HTTP_USER_AGENT'] );
+		$pos_playbook   = stripos( $agent, 'PlayBook' );
+		$pos_rim_tablet = stripos( $agent, 'RIM Tablet' );
+
+		if ( ( false === $pos_playbook ) || ( false === $pos_rim_tablet ) ) {
+			return false;
+		} else {
+			return true;
+		}
+	}
+
+	/**
+	 * The is_blackbeberry() method can be used to check the User Agent for a blackberry device.
+	 * Note that opera mini on BB matches this rule.
+	 */
+	public static function is_blackbeberry() {
+		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
+			return false;
+		}
+
+		$agent = strtolower( $_SERVER['HTTP_USER_AGENT'] );
+
+		$pos_blackberry = strpos( $agent, 'blackberry' );
+		if ( false !== $pos_blackberry ) {
+			if ( self::is_opera_mini() || self::is_opera_mobile() || self::is_firefox_mobile() ) {
+				return false;
+			} else {
+				return true;
+			}
+		} else {
+			return false;
+		}
+	}
+
+	/**
+	 * The is_blackberry_10() method can be used to check the User Agent for a BlackBerry 10 device.
+	 */
+	public static function is_blackberry_10() {
+		$agent = strtolower( $_SERVER['HTTP_USER_AGENT'] );
+		return ( strpos( $agent, 'bb10' ) !== false ) && ( strpos( $agent, 'mobile' ) !== false );
+	}
+
+	/**
+	 * Retrieve the blackberry OS version.
+	 *
+	 * Return strings are from the following list:
+	 * - blackberry-10
+	 * - blackberry-7
+	 * - blackberry-6
+	 * - blackberry-torch //only the first edition. The 2nd edition has the OS7 onboard and doesn't need any special rule.
+	 * - blackberry-5
+	 * - blackberry-4.7
+	 * - blackberry-4.6
+	 * - blackberry-4.5
+	 *
+	 * @return string Version of the BB OS.
+	 * If version is not found, get_blackbeberry_OS_version will return boolean false.
+	 */
+	public static function get_blackbeberry_OS_version() {
+
+		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
+			return false;
+		}
+
+		if ( self::is_blackberry_10() ) {
+			return 'blackberry-10';
+		}
+
+		$agent = strtolower( $_SERVER['HTTP_USER_AGENT'] );
+
+		$pos_blackberry = stripos( $agent, 'blackberry' );
+		if ( false === $pos_blackberry ) {
+			// Not a blackberry device.
+			return false;
+		}
+
+		// Blackberry devices OS 6.0 or higher.
+		// Mozilla/5.0 (BlackBerry; U; BlackBerry 9670; en) AppleWebKit/534.3+ (KHTML, like Gecko) Version/6.0.0.286 Mobile Safari/534.3+.
+		// Mozilla/5.0 (BlackBerry; U; BlackBerry 9800; en) AppleWebKit/534.1+ (KHTML, Like Gecko) Version/6.0.0.141 Mobile Safari/534.1+.
+		// Mozilla/5.0 (BlackBerry; U; BlackBerry 9900; en-US) AppleWebKit/534.11+ (KHTML, like Gecko) Version/7.0.0 Mobile Safari/534.11+.
+		$pos_webkit = stripos( $agent, 'webkit' );
+		if ( false !== $pos_webkit ) {
+			// Detected blackberry webkit browser.
+			$pos_torch = stripos( $agent, 'BlackBerry 9800' );
+			if ( false !== $pos_torch ) {
+				return 'blackberry-torch'; // Match the torch first edition. the 2nd edition should use the OS7 and doesn't need any special rule.
+			} else {
+				// Detecting the BB OS version for devices running OS 6.0 or higher.
+				if ( preg_match( '#Version\/([\d\.]+)#i', $agent, $matches ) ) {
+					$version     = $matches[1];
+					$version_num = explode( '.', $version );
+					if ( false === is_array( $version_num ) || count( $version_num ) <= 1 ) {
+						return 'blackberry-6'; // not a BB device that match our rule.
+					} else {
+						return 'blackberry-' . $version_num[0];
+					}
+				} else {
+					// if doesn't match returns the minimun version with a webkit browser. we should never fall here.
+					return 'blackberry-6'; // not a BB device that match our rule.
+				}
+			}
+		}
+
+		// Blackberry devices <= 5.XX.
+		// BlackBerry9000/5.0.0.93 Profile/MIDP-2.0 Configuration/CLDC-1.1 VendorID/179.
+		if ( preg_match( '#BlackBerry\w+\/([\d\.]+)#i', $agent, $matches ) ) {
+			$version = $matches[1];
+		} else {
+			return false; // not a BB device that match our rule.
+		}
+
+		$version_num = explode( '.', $version );
+
+		if ( is_array( $version_num ) === false || count( $version_num ) <= 1 ) {
+			return false;
+		}
+
+		$version_num_major = intval( $version_num[0] );
+		$version_num_minor = intval( $version_num[1] );
+
+		if ( 5 === $version_num_major ) {
+			return 'blackberry-5';
+		} elseif ( 4 === $version_num_major && 7 === $version_num_minor ) {
+			return 'blackberry-4.7';
+		} elseif ( 4 === $version_num_major && 6 === $version_num_minor ) {
+			return 'blackberry-4.6';
+		} elseif ( 4 === $version_num_major && 5 === $version_num_minor ) {
+			return 'blackberry-4.5';
+		} else {
+			return false;
+		}
+
+	}
+
+	/**
+	 * Retrieve the blackberry browser version.
+	 *
+	 * Return string are from the following list:
+	 * - blackberry-10
+	 * - blackberry-webkit
+	 * - blackberry-5
+	 * - blackberry-4.7
+	 * - blackberry-4.6
+	 *
+	 * @return string Type of the BB browser.
+	 * If browser's version is not found, detect_blackbeberry_browser_version will return boolean false.
+	 */
+	public static function detect_blackberry_browser_version() {
+
+		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
+			return false;
+		}
+
+		$agent = strtolower( $_SERVER['HTTP_USER_AGENT'] );
+
+		if ( self::is_blackberry_10() ) {
+			return 'blackberry-10';
+		}
+
+		$pos_blackberry = strpos( $agent, 'blackberry' );
+		if ( false === $pos_blackberry ) {
+			// Not a blackberry device.
+			return false;
+		}
+
+		$pos_webkit = strpos( $agent, 'webkit' );
+
+		if ( ! ( false === $pos_webkit ) ) {
+			return 'blackberry-webkit';
+		} else {
+			if ( preg_match( '#BlackBerry\w+\/([\d\.]+)#i', $agent, $matches ) ) {
+				$version = $matches[1];
+			} else {
+				return false; // not a BB device that match our rule.
+			}
+
+			$version_num = explode( '.', $version );
+
+			if ( false === is_array( $version_num ) || count( $version_num ) <= 1 ) {
+				return false;
+			}
+
+			$version_num_major = intval( $version_num[0] );
+			$version_num_minor = intval( $version_num[1] );
+
+			if ( 5 === $version_num_major ) {
+				return 'blackberry-5';
+			} elseif ( 4 === $version_num_major && 7 === $version_num_minor ) {
+				return 'blackberry-4.7';
+			} elseif ( 4 === $version_num_major && 6 === $version_num_minor ) {
+				return 'blackberry-4.6';
+			} else {
+				// A very old BB device is found or this is a BB device that doesn't match our rules.
+				return false;
+			}
+		}
+
+	}
+
+	/**
+	 * Checks if a visitor is coming from one of the WordPress mobile apps.
+	 *
+	 * @return bool
+	 */
+	public static function is_mobile_app() {
+
+		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
+			return false;
+		}
+
+		$agent = strtolower( $_SERVER['HTTP_USER_AGENT'] );
+
+		if ( isset( $_SERVER['X_USER_AGENT'] ) && preg_match( '|wp-webos|', $_SERVER['X_USER_AGENT'] ) ) {
+			return true; // Wp4webos 1.1 or higher.
+		}
+
+		$app_agents = array( 'wp-android', 'wp-blackberry', 'wp-iphone', 'wp-nokia', 'wp-webos', 'wp-windowsphone' );
+		// the mobile reader on iOS has an incorrect UA when loading the reader
+		// currently it is the default one provided by the iOS framework which
+		// causes problems with 2-step-auth
+		// User-Agent	WordPress/3.1.4 CFNetwork/609 Darwin/13.0.0.
+		$app_agents[] = 'wordpress/3.1';
+
+		foreach ( $app_agents as $app_agent ) {
+			if ( false !== strpos( $agent, $app_agent ) ) {
+				return true;
+			}
+		}
+		return false;
+	}
+
+	/**
+	 * Detects if the current browser is Nintendo 3DS handheld.
+	 *
+	 * Example: Mozilla/5.0 (Nintendo 3DS; U; ; en) Version/1.7498.US
+	 * can differ in language, version and region
+	 */
+	public static function is_Nintendo_3DS() {
+		if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
+			return false;
+		}
+
+		$ua = strtolower( $_SERVER['HTTP_USER_AGENT'] );
+		if ( strpos( $ua, 'nintendo 3ds' ) !== false ) {
+			return true;
+		}
+		return false;
+	}
+
+	/**
+	 * Was the current request made by a known bot?
+	 *
+	 * @return boolean
+	 */
+	public static function is_bot() {
+		static $is_bot = null;
+
+		if ( is_null( $is_bot ) ) {
+			$is_bot = self::is_bot_user_agent( $_SERVER['HTTP_USER_AGENT'] );
+		}
+
+		return $is_bot;
+	}
+
+	/**
+	 * Is the given user-agent a known bot?
+	 * If you want an is_bot check for the current request's UA, use is_bot() instead of passing a user-agent to this method.
+	 *
+	 * @param string $ua A user-agent string.
+	 *
+	 * @return boolean
+	 */
+	public static function is_bot_user_agent( $ua = null ) {
+
+		if ( empty( $ua ) ) {
+			return false;
+		}
+
+		$bot_agents = array(
+			'alexa',
+			'altavista',
+			'ask jeeves',
+			'attentio',
+			'baiduspider',
+			'bingbot',
+			'chtml generic',
+			'crawler',
+			'fastmobilecrawl',
+			'feedfetcher-google',
+			'firefly',
+			'froogle',
+			'gigabot',
+			'googlebot',
+			'googlebot-mobile',
+			'heritrix',
+			'httrack',
+			'ia_archiver',
+			'irlbot',
+			'iescholar',
+			'infoseek',
+			'jumpbot',
+			'linkcheck',
+			'lycos',
+			'mediapartners',
+			'mediobot',
+			'motionbot',
+			'msnbot',
+			'mshots',
+			'openbot',
+			'pss-webkit-request',
+			'pythumbnail',
+			'scooter',
+			'slurp',
+			'snapbot',
+			'spider',
+			'taptubot',
+			'technoratisnoop',
+			'teoma',
+			'twiceler',
+			'yahooseeker',
+			'yahooysmcm',
+			'yammybot',
+			'ahrefsbot',
+			'pingdom.com_bot',
+			'kraken',
+			'yandexbot',
+			'twitterbot',
+			'tweetmemebot',
+			'openhosebot',
+			'queryseekerspider',
+			'linkdexbot',
+			'grokkit-crawler',
+			'livelapbot',
+			'germcrawler',
+			'domaintunocrawler',
+			'grapeshotcrawler',
+			'cloudflare-alwaysonline',
+		);
+
+		foreach ( $bot_agents as $bot_agent ) {
+			if ( false !== stripos( $ua, $bot_agent ) ) {
+				return true;
+			}
+		}
+
+		return false;
+	}
+}
diff --git a/packages/device-detection/tests/php/bootstrap.php b/packages/device-detection/tests/php/bootstrap.php
new file mode 100644
index 0000000000000..f5496b950acfd
--- /dev/null
+++ b/packages/device-detection/tests/php/bootstrap.php
@@ -0,0 +1,9 @@
+<?php
+/**
+ * Tests bootstrap.
+ *
+ * @package automattic/jetpack-device-detection
+ */
+
+// @phpcs:disable Squiz.Commenting.FileComment
+require_once __DIR__ . '/../../vendor/autoload.php';
diff --git a/packages/device-detection/tests/php/test_DeviceDetection.php b/packages/device-detection/tests/php/test_DeviceDetection.php
new file mode 100644
index 0000000000000..c0c5d4495465f
--- /dev/null
+++ b/packages/device-detection/tests/php/test_DeviceDetection.php
@@ -0,0 +1,144 @@
+<?php
+/**
+ * Tests for the Automattic\Jetpack\Mobile package.
+ *
+ * @package automattic/jetpack-device-detection
+ *
+ * @phpcs:disable WordPress.Files.FileName
+ */
+
+use PHPUnit\Framework\TestCase;
+use Automattic\Jetpack\Device_Detection;
+
+/**
+ * Tests for the Device_Detection class.
+ */
+class Test_Device_Detection extends TestCase {
+
+	/**
+	 * The is_mobile tests.
+	 *
+	 * @param string $ua                   User agent string.
+	 * @param array  $expected_types       Expected device types to be detected for a user-agent.
+	 * @param bool   $expected_ua_returned Expected value for UA returned by the method.
+	 *
+	 * @return void
+	 *
+	 * @dataProvider ua_provider
+	 */
+	public function test_is_mobile( $ua, array $expected_types, $expected_ua_returned ) {
+		$_SERVER['HTTP_USER_AGENT'] = $ua;
+
+		$device_info      = Device_Detection::get_info();
+		$all_tested_types = array( 'is_phone', 'is_smartphone', 'is_handheld', 'is_tablet', 'is_desktop' );
+
+		foreach ( $all_tested_types as $type ) {
+			$is_type_match_expected = in_array( $type, $expected_types, true );
+
+			// Test the info returned by `get_info`.
+			$this->assertEquals( $is_type_match_expected, $device_info[ $type ] );
+
+			// Make sure the appropriate type method exists on Device_Detection.
+			$this->assertTrue( method_exists( 'Automattic\Jetpack\Device_Detection', $type ) );
+
+			// Make sure the direct method (e.g. Device_Detection::is_desktop) returns the correct value.
+			$this->assertEquals( $is_type_match_expected, call_user_func( array( 'Automattic\Jetpack\Device_Detection', $type ), $ua ) );
+		}
+		$this->assertEquals( $device_info['is_phone'] ? $expected_ua_returned : false, $device_info['is_phone_matched_ua'] );
+	}
+
+	/**
+	 * Data provider for test_is_mobile.
+	 *
+	 * @return array
+	 */
+	public function ua_provider() {
+		return array(
+
+			// Nokia 6300, dumb phone.
+			array(
+				'Nokia6300/2.0 (05.00) Profile/MIDP-2.0 Configuration/CLDC-1.1',
+				array(
+					'is_phone',
+					'is_handheld',
+				),
+				'nokia',
+			),
+
+			// Samsung Galaxy S8 smart phone.
+			array(
+				'Mozilla/5.0 (Linux; Android 9; SM-G950F Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/74.0.3729.157 Mobile Safari/537.36',
+				array(
+					'is_phone',
+					'is_smartphone',
+					'is_handheld',
+				),
+				'android',
+			),
+
+			// iPhone X smart phone.
+			array(
+				'Mozilla/5.0 (iPhone; CPU iPhone OS 11_4_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/11.0 Mobile/15E148 Safari/604.1',
+				array(
+					'is_phone',
+					'is_smartphone',
+					'is_handheld',
+				),
+				'iphone',
+			),
+
+			// iPad 2 10.5 tablet.
+			array(
+				'Mozilla/5.0 (iPad; CPU OS 11_4_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/15G77 [FBAN/FBIOS;FBDV/iPad7,3;FBMD/iPad;FBSN/iOS;FBSV/11.4.1;FBSS/2;FBCR/;FBID/tablet;FBLC/en_US;FBOP/5;FBRV/0]',
+				array(
+					'is_tablet',
+					'is_handheld',
+				),
+				false,
+			),
+
+			// Kindle 3.
+			array(
+				'Mozilla/5.0 (X11; U; Linux armv7l like Android; en-us) AppleWebKit/531.2+ (KHTML, like Gecko) Version/5.0 Safari/533.2+ Kindle/3.0+',
+				array(
+					'is_phone',
+					'is_smartphone',
+					'is_tablet',
+					'is_handheld',
+				),
+				'android',
+			),
+
+			// Huawei p20 smartphone.
+			array(
+				'Mozilla/5.0 (Linux; Android 8.1.0; CLT-L09 Build/HUAWEICLT-L09) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Mobile Safari/537.36',
+				array(
+					'is_phone',
+					'is_smartphone',
+					'is_handheld',
+				),
+				'android',
+			),
+
+			// Googlebot smartphone.
+			array(
+				'Mozilla/5.0 (Linux; Android 6.0.1; Nexus 5X Build/MMB29P) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/W.X.Y.Z‡ Mobile Safari/537.36 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)',
+				array(
+					'is_phone',
+					'is_smartphone',
+					'is_handheld',
+				),
+				'android',
+			),
+
+			// Googlebot desktop.
+			array(
+				'Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)',
+				array(
+					'is_desktop',
+				),
+				false,
+			),
+		);
+	}
+}