Windows Phone version history

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This page provides details for the version history of the Microsoft's Windows Phone branded mobile operating systems, from the release of Windows Phone 7 in October 2010, which was preceded by Windows Mobile version 6.x.

Windows Phone 7[edit]

Windows Phone 7 was the first release of the Windows Phone mobile client operating system, released worldwide on October 21, 2010, and in the United States on November 8, 2010.

Table of versions[edit]

  Previous   Current   Preview

Windows Phone 7.5 [edit]

Windows Phone 7.5 logo

At the 2011 Mobile World Congress, Steve Ballmer announced a major update to Windows Phone 7 due toward the end of the year, Windows Phone 7.5, codenamed Mango.[2] The new OS would address many of the platform's shortcomings, including a mobile version of Internet Explorer 9 that supports the same web standards and graphical capability as the desktop version, multi-tasking of third-party apps,[3][4] Twitter integration for the People Hub,[5][6][7] and Windows Live SkyDrive access.[8] Although the OS internally identifies itself as version 7.1, it is marketed as version 7.5 in all published materials intended for end-users.[9][10]

Microsoft started rolling out Windows Phone 7.5 to both the United States[11] and International[12] markets on September 27, 2011. The first phones that came pre-loaded with Windows Phone 7.5 were released in the last quarter of 2011.

Tango update A minor update released in 2012 known as "Tango", along with other bug fixes, would also lower the hardware requirements to allow for devices with 800 MHz CPUs and 256 MB of RAM to run Windows Phone. Certain resource-intensive features are also disabled on these phones, and the Windows Phone Store will also prevent the installation of apps that are considered to be too intensive for use on weaker hardware.[13] The lower requirements were adopted in order to allow the development of lower-cost devices, particularly to target emerging markets such as China.[14]

Table of versions[edit]

  Previous   Current   Preview

Windows Phone 7.8[edit]

Previously released Windows Phone hardware is incapable of being upgraded to Windows Phone 8, due to changes in the kernel requirements and hardware specifications. However, Microsoft announced at the Windows Phone 8 announcement event that Windows Phone 7.x devices would receive a free upgrade to Windows Phone 7.8. Microsoft announced Windows Phone 7.8 alongside Windows Phone 8 and began pushing the update to devices in January 2013. It added some features from the Windows NT based Windows Phone 8, backported to Windows Phone 7. These features included the updated start screen that allowed users to resize live tiles, additional theme colors, and an update to the lock screen that would optionally display the daily Bing homepage picture automatically. Windows Phone 7.8 does not support USSD.

Table of versions[edit]

  Previous   Current   Preview

Windows Phone 8[edit]

Windows Phone 8 logo


General Distribution Release 1, a minor update known as Portico was rolled out on December 2012 that brought some improvements and bugfixes, including enhancements in Messaging, more efficient Bluetooth connectivity, and an "always-on" setting for WiFi connections, among other additional platform updates


Microsoft rolled out a package of minor updates called General Distribution Release 2, beginning in July 2013 and spanning the following months, depending on the manufacturer and carrier. Along with this update Nokia released its own update which updated the firmware of the user, namely Lumia Amber, which was available for only Lumia phones. The update brought many camera improvements and fixed some bugs in the cameras of existing Lumia phones.


On October 14, 2013, Microsoft released the third General Distribution Release update for Windows Phone 8, which would roll out to phones over the following months. Windows Phone Developers were among the first to receive the update under a new Developer Preview Program.

Table of versions[edit]

  Previous   Current   Preview

Windows Phone 8.1[edit]

Windows Phone 8.1 logo


General Distribution Release 1 (GDR1; also referred to as Update 1) adds new language and region support for Cortana, the option to organize apps into folders on the Start Screen, SMS forwarding of multiple messages, improvements to Xbox Music, a live tile for the Windows Phone Store and an option for sandboxing applications. In addition, Update 1/GDR1 also includes new VPN and Bluetooth features for enterprise users, as well as support for interactive cases such as HTC's "Dot View" case, larger "phablet" screen resolutions such as 1280x800, 540x960 qHD and 1280x768 and the Qualcomm QuickCharge 2.0 standard.[42][43]

Microsoft has made several changes to Internet Explorer Mobile that brings the browser experience closer in line with the experiences on Safari (iOS) and Chrome (Android). To accomplish this, Microsoft moved away from open standards and adopted non-standard features used in Safari and Chrome, implemented browser detection, improved page rendering by detecting legacy WebKit features, brought support for HTML5, and fixed interoperability issues with bad HTML code.[44]

An example for the comparison of the changes made to the user-agent string in Update 1/GDR1 in order to overcome erroneous methods of browser detection and correctly deliver mobile content to Internet Explorer Mobile.[45][46]

IE11 on Windows Phone 8.1:
Mozilla/5.0 (Windows Phone 8.1; ARM; Trident/7.0; Touch; rv:11; IEMobile/11.0; NOKIA; Lumia 928) like Gecko
IE11 on Windows Phone 8.1 with Update 1/GDR1:
Mozilla/5.0 (Mobile; Windows Phone 8.1; Android 4.0; ARM; Trident/7.0; Touch; rv:11.0; IEMobile/11.0; NOKIA; Lumia 720) like iPhone OS 7_0_3 Mac OS X AppleWebKit/537 (KHTML, like Gecko) Mobile Safari/537


Information regarding GDR2 (also referred to as Update 2) was released in February 2015 it was revealed that Microsoft was working on a 2nd update for Windows Phone 8.1 that would provide increased security for OEM's, add extra languages and additional technology support and is also reported to bring an anti-theft mode.[47]

Table of versions[edit]

  Previous   Current   Preview

Table of versions: Windows Phone 8.1
Version Release date Highlights


April 14, 2014

User Interface

  • Action Center showing either standard or silent toast notifications, accessed by swiping from top to the bottom
  • Quick settings access in action center with four (or five on large screens like 6 inch Nokia Lumia 1520[48]) configurable shortcuts to: Airplane mode, bluetooth, brightness, camera, internet sharing, location, project screen, Quiet Hours, rotation lock, VPN, Wi-Fi [items in this list cannot be changed]
  • Start screen backgrounds
  • Support for start screen live tile rows of up to 6 small or 3 medium live tiles[49]
  • 'Cortana' smart personal assistant, based on the Bing service [available only on limited number of markets]
  • Swipe down to close apps in multitasking view
  • Recently installed apps are annotated with 'NEW' in the app list[50]
  • Support for virtual on-screen buttons called 'Navigation bar' with custom background color selection
  • Gesture keyboard, that is, swipe across letters on keyboard to type (Shape Writing) [not available on all languages / keyboards types]

General user experience changes

  • Bing smart search (similar search system as Windows 8.1)
  • Back button doesn't close application
  • Contact speed dialling
  • Ability to show only Contacts with phone number
  • Contacts with 'Inner Circle'; up to 40 Contacts (requires Cortana support)
  • Double-Tap to unlock your phone (Feature from Lumia devices on Amber Update and newer)
  • Favourite photos by tapping a heart icon
  • General keyboard enhancements including show emoji when typing and recognize names of Contacts
  • In-call speech commands
  • Notification if charger isn't of adequate power
  • Quiet Hours - Disable notifications during pre-selected time-frame or when 'Busy' in calendar (requires Cortana)[51]
  • Screenshot button combination is now Power + Volume Up
  • Search button will be the new way to open Speech (aka ‘Cortana’)
  • Separate volume controls for ringtones/notifications and music/media
  • Set default Voice Navigation app for the OS
  • Voice Narrator for Accessibility
  • File picker
  • Wi-Fi Sense: sharing secured Wi-Fi Networks with contacts if they have Wi-Fi Sense
  • Wi-Fi can auto re-enable after a set duration of time
  • Status bar with Signal strength, Wi-Fi, Battery etc. is always visible (doesn't auto-hide)[50]
  • Phone history group repeat calls from a user annotated with number of calls[50]

New technology support

  • VPN (Virtual Private Network), auto-triggered VPN
  • Enterprise Wi-Fi support with EAP-TLS
  • Miracast; PlayTo and mirroring of Windows Phone screen to TVs and/or monitors
  • Bluetooth 4.0 LE (requires phone firmware support, temporarily removed from DP version)
  • Dual SIM
  • Mouse and keyboard (HID) (in fact there is no HID support in WP 8.1 currently, true HID support is expected in WP 8.1 GDR2 somewhere in middle of 2015)
  • Support for Qualcomm Snapdragon 200/400/400 LTE
  • Full support for TD-LTE and SGLTE

Internet Explorer 11

  • WebGL
  • Normal mapping
  • File uploads
  • File downloads to local storage
  • Password manager
  • Video player including HTML5 video support (video playback doesn't have to be full screen)
  • Tab, history, favorites and password synchronization with Internet Explorer 11 in Windows 8.1
  • Forward and back by swiping right and left


  • Ability to install apps, save photos, app and game data on inserted SD Cards (apps on SD Cards only allowed from one originating phone)
  • Auto-updates for apps (like Windows 8.1), including when only on Wi-Fi
  • App Suggestions by location
  • Better backup functionality including app and game data to OneDrive (if developer enabled)
  • Battery power sense, monitors app battery usage
  • Battery Saver (under Battery Sense) will have an app exclusion list
  • Single sign-in for apps (like on Windows 8) with Microsoft Account; sign in will persist across devices + apps with permissions prompt
  • Podcast app powered by Bing, full featured
  • Facebook and OneDrive photos integration in photos app removed
  • Office apps support password protected documents
  • Office Lens support for scanning documents with camera, import into Office with OCR
  • OneDrive (previously SkyDrive) with integrated file browser (like Windows 8.1)
  • Twitter integrated more deeply into the contacts Hub
  • Updated calendar app with weather for days and week view
  • Updated camera app, similar to Windows 8.1, with burst mode.
  • Updated email app with ability to always download emails and pictures within them, sync with accordance to usage patterns
  • Updated messaging app with ability to mute thread
  • Xbox Music and Xbox Video as standalone apps instead of the Music + Video Hub (allowing more updates to be pushed)
  • Xbox Game Hub redesigned


  • Chkdsk for SD cards to ensure card health
  • The phone will have to update to the latest version before you can restore it to factory settings
  • Trusted app list for NFC that will remove the need for asking whether you want to open a particular app
  • Virtual SmartCard support
  • Wallet supports tickets, membership cards, and Passbook
  • Ability for operators to install certain applications once SIM card is detected
  • Ability for operators to control Data Sense limits remotely


  • S/MIME to sign and encrypt email
  • Enterprise enrolled phones can have their passwords changed and remotely locked
  • Access to corporate resources behind the firewall with app aware
  • Certificate management to enroll, update and revoke certificates for user authentication
  • Enhanced MDM policies to lock down functionality on the phone for more enterprise control, in addition to richer application management such as allowing or denying the installing of certain apps.

Developer features

  • Background tasks: Bluetooth signal strength, Chat message notification, Device connection change, Device use trigger, Gatt characteristic notification, Location, Push notification, Rfcomm connection, System event, Timer
  • Geofencing API for location-based reminders
  • Native HTML5/JavaScript app development support
  • Audio/video transcoding (same API as in WinRT), hardware accelerated
  • Media editing: audio and video effects; slow motion video
  • Apps can capture audio/video from themselves
  • New APPX app package format for new Windows Phone 8.1 apps, similar to Windows 8.1 APPX format
  • Stereoscopic 3D support
  • New developer tools including: SemanticZoom, DatePicker, TimePicker


May 14, 2014

  • Intermediate update
  • Features "several quality improvements"


June 2, 2014

  • Change in Boot Logo
  • Some minor bug fixes
  • Battery improvement


June 12, 2014

  • Improvements to APIs
  • Enables new devices


July 16, 2014



August 4, 2014


  • New country support for Cortana; China, UK, Canada, India and Australia
  • Support for a store live tile when the tile is medium-sized
  • Store tile size has been standardized for all layouts and some tiles have changed places on the Start screen.
  • Improved Xbox music app and live tile support.
  • Support for app folders.
  • Enable phone cover apps to launch when a phone cover is closed and specify the default setting for the lock screen's auto unlock setting.
  • SMS merge & forwarding
  • Apps Corner; specify which apps are displayed in a special sandboxed mode or boot straight to an app
  • Hundreds of Internet Explorer 11 enhancements that greatly increase compatibility with the mobile web[54]

General user experience changes

  • Add phone book entry for Cortana to allow users to initiate speech from a car that doesn't have support for activating speech on the phone that is connected over Bluetooth.
  • USB action choices
  • User-customizable snooze settings for alarms
  • Improved selection, possibility to delete multiple calls, messages or contacts
  • Support for password protected office documents

New technology support

  • Dual SIM CDMA + GSM radio support
  • Bluetooth PAN (personal area network) 1.0 profile
  • Bluetooth aptX codec support for A2DP
  • Bluetooth browsing support for AVRCP
  • Bluetooth accessory notifications
  • Network Time Protocol support; automatically set the time using an NTP client in a Windows Phone device that doesn't support NITZ or when cellular data is not available.
  • Voice over LTE (VoLTE) support
  • Support for Qualcomm Quick charge 2.0, up to 75% faster charging in supported devices (Snapdragon 400, 600 and 800)


  • Send and receive data through a virtual private network (VPN) when connecting to Wi-Fi hotspots
  • Support for L2TP VPN protocol with IPsec


  • Support for notification LED[53]
  • Support for custom lock screens
  • Support for 1280 x 800 WXGA resolution
  • 540 x 960 qHD resolution support for diagonal screen sizes up to 6"
  • 1280 x 768 WXGA resolution support for diagonal screen sizes of 6.01" to 7
  • Possibility to install Wi-Fi Feature Pack which removes all cellular-related functionality from the operating system


August 19, 2014

  • Bug Fixes


September 24, 2014

  • Fixes error 80188308 some users were experiencing during update ( works in HTC 8X India model- in preview for developers )
  • HTC Windows Phones 8X, 8S, and 8XT will now be able to get the Windows Phone 8.1 Update
  • Fixes an Access Violation in "minuser" component which caused WinRT apps and WebViews to crash if scrolled by the user while (or 2–15 seconds after) loading, which was a regression introduced in the 8.1 Update 1 release (8.10.14147.180).


October 24, 2014

  • Tests Microsoft's ability to distribute a "Critical Update". Note that this update does not actually contain critical fixes - it's just a test.


November 13, 2014

  • "Critical Update" for unstated reasons
  • Allows for real-time Live Tile for the Battery Saver App (also allows you to add Battery Saver to the Quick Settings found in the Action and Notification Center)
  • Adds preferred install time for automatic updates
  • Made NTP time sync support enabled by default for CV devices (instead of rely on OEM to enable it)


December 5, 2014

  • New country support for Cortana; Spain, France, Germany and Italy (alpha). (However, due to a widespread bug in the deployment, Cortana is not available for many users)
  • Cellular Data Toggle for Quick Settings access in Action Center.
  • Support for offline maps storage on MicroSD card
  • Hardware keyboard support
  • Ability to use the SD card storage space temporarily for OS updates (must be enabled in the ROM)


December 24, 2014

  • Fixes screen issues on the Microsoft Lumia 535


February 24, 2015

  • Fixes screen issues on the Microsoft Lumia 535 (not be solved with the previous update)


March 2, 2015

General user experience changes

  • Additional language support (Bangla, Khmer, Kiswahili, Lao)
  • All apps button at bottom of start screen
  • Ability to rename the phone from the About section, without the need for connecting to the PC via USB
  • Double-tap on navigation bar to turn off screen[56]
  • Settings categorized and searchable[57][58]

New technology support[59]

  • Bluetooth Message Access Profile
  • Bluetooth Human Interface Device Profile 1.1
  • Bluetooth HID over Generic Attribute Profile
  • Absolute Volume Control (part of AVRCP)
  • Video over LTE
  • MKV video container support[60]

Security features

  • Anti-theft reset protection[61]
  • Customizable app permissions for calendar, camera, contacts, messages and microphone[58]


March 2015

  • Anti-theft reset protection (available only for new phones running build 8.10.15127.138)[62]


March 2015


March 2015


April 2015


April 2015


May 2015

  • Voice over LTE support enabled for selected operators.
  • Native Wi-Fi calling support enabled for EE UK and T-Mobile USA.
  • Additional improvements to stability, audio quality, Wi-Fi and cellular connectivity, national roaming, and more.[63]


June 2015


July 2015


January 2016


August 2016


March 2017

  • Only includes keyboard and speech files


December 2017

  • Only includes keyboard and speech files


November 2018

  • Only includes keyboard and speech files


June 2019

  • Only includes keyboard and speech files
Version Release date Highlights

Windows 10 Mobile[edit]

Windows 10 logo

Windows 10 Mobile was announced on January 21, 2015, as a mobile operating system for smartphones and tablets with screens smaller than 8 inches, with the first build released on February 12, 2015.[64] It is the successor to Windows Phone 8.1[65] and replaced the Windows Phone brand, while Microsoft has since ceased active development of Windows 10 Mobile. Windows Phone 8.1 devices are eligible for upgrade to Windows 10, pursuant of manufacturer and carrier support.[66] Some features may vary depending on hardware compatibility.[67]

See also[edit]


  1. ^ Tom Warren. "Windows Phone 7 "NoDo" update now available". WinRumors. Archived from the original on July 25, 2014. Retrieved April 5, 2014.
  2. ^ Shankland, Stephen (February 15, 2011). "Windows Phone 7 update to offer IE9". ZDNet. CBS Interactive. Retrieved March 24, 2011.
  3. ^ Stevens, Tim (February 14, 2011). "Windows Phone 7's multitasking uses zoomed-out cards to check on your apps". Engadget. AOL. Retrieved March 24, 2011.
  4. ^ Cha, Bonnie (February 14, 2011). "Multitasking, IE9 coming to Windows Phone". CNET. CBS Interactive. Archived from the original on April 25, 2012. Retrieved March 24, 2011.
  5. ^ Bright, Peter (February 14, 2011). "Windows Phone 7's future revealed: multitasking, IE9, Twitter". Ars Technica. Condé Nast Digital. Retrieved October 27, 2011.
  6. ^ Mathews, Lee (February 14, 2011). "Windows Phone 7 update to bring Twitter and SkyDrive integration, webOS style multitasking". Switched. AOL. Archived from the original on July 7, 2012. Retrieved October 27, 2011.
  7. ^ Stevens, Tim (February 14, 2011). "Windows Phone 7's multitasking uses zoomed-out cards to check on your apps". Engadget. AOL. Retrieved March 24, 2011.
  8. ^ Ponder, George (February 14, 2011). "New features heading to Windows Phone 7: Multi-tasking, IE9, Skydrive and more". Mobile Nations. Retrieved October 27, 2011.
  9. ^ Devereux, William (July 27, 2011). "Windows Phone Mango officially branded 7.1, marketed as 7.5". Anything But iPhone. Archived from the original on October 16, 2011. Retrieved August 23, 2011.
  10. ^ Foley, Mary Jo (July 27, 2011). "Microsoft gives Windows Phone developers a refreshed (non-RTM) Mango build". ZDNet. Retrieved August 23, 2011.
  11. ^ "The Smartphone Reinvented Around You - Windows Phone (USA)". Microsoft. Archived from the original on September 30, 2011. Retrieved April 18, 2012.
  12. ^ "The Smartphone Reinvented Around You - Windows Phone (United States)". Microsoft.[permanent dead link]
  13. ^ Warren, Tom (March 8, 2012). "Microsoft details full Windows Phone 'Tango' 256MB RAM device limitations". The Verge. Vox Media. Retrieved June 20, 2012.
  14. ^ Warren, Tom (February 27, 2012). "Windows Phone 7.5 update will support 256MB RAM and slower processors in April". The Verge. Vox Media. Retrieved June 21, 2012.
  15. ^ Matthew Miller (June 20, 2011). "Hands-on with Windows Phone 7.5 Mango technical preview". zdNet. Archived from the original on June 23, 2011. Retrieved June 21, 2011.
  16. ^ Richard Adhikari (May 24, 2011). "WP7 Visual Voicemail". TechNewsWorld. Retrieved June 14, 2011.
  17. ^ Devereux, William (May 24, 2011). "Bing on Windows Phone Mango Revolutionizes Mobile Search". Anything but iPhone. Archived from the original on February 16, 2015. Retrieved February 15, 2015.
  18. ^ Vincent Nguyen (June 20, 2011). "Windows Phone 7.1 Mango Technical Preview". SlashGear. Retrieved June 21, 2011.
  19. ^ Adam Z Lein (August 28, 2011). "Why Windows Phone Mango Can't Edit Older Office Documents". Pocketnow. Retrieved May 4, 2012.
  20. ^ a b c d e f g h i j k What’s new in Pictures + Camera for Mango
  21. ^ Amar Toor (August 25, 2011). "Microsoft: front facing cameras, Skype integration coming with Mango update". Engadget. Retrieved August 25, 2011.
  22. ^ Bonnie Cha and Jessica Dolcourt (June 20, 2011). "Hands-on with Windows Phone 7.5 Mango technical preview". cNet. Retrieved June 21, 2011.
  23. ^ Todd Bishop. "Windows Phone games: Details on Microsoft's 'Fast Async' service - GeekWire". GeekWire.
  24. ^ "Is Find on Page feature being removed from IE9 Mango?!". Microsoft.
  25. ^ Sean Buckley (August 24, 2011). "Mango teaches Windows Phone to share, probably still needs carrier permission". Engadget. Retrieved August 24, 2011.
  26. ^ Adam Z Lein (June 21, 2011). "The Ultimate Windows Phone 7.5 Mango Preview". PocketNow. Retrieved June 23, 2011.
  27. ^ "Samsung Focus Alarm Now Too Loud?". October 5, 2011. Retrieved October 26, 2011.
  28. ^ "Mango Changed my Alarm Snooze interval???". October 17, 2011. Retrieved October 26, 2011.
  29. ^ "Additions in the Windows Phone SDK 7.1". March 23, 2012. Retrieved May 30, 2012.
  30. ^ Tom Warren (November 17, 2011). "Windows Phone Update". winrumors. Archived from the original on November 19, 2011. Retrieved November 17, 2011.
  31. ^ Tom Warren (January 4, 2012). "Windows Phone update rolling out, fixes disappearing keyboard and location privacy bugs". The Verge. Retrieved January 4, 2012.
  32. ^ Daniel Rubino (April 2012). "Nokia readies Lumia 710 Mango OS update for China". WPcentral.[permanent dead link]
  33. ^ a b Daniel Rubino (July 2012). "Some new undocumented features of Windows Phone mango". WPcentral.[permanent dead link]
  34. ^ Aviraj Ajgekar (May 2012). "HTC Mozart: Windows Phone Update from 7.10.8107 to 7.10.8112.7 to 7.10.8773.98 to 7.10.8779.8 !!". Aviraj Ajgekar Blog.
  35. ^ Joe Belfiore (February 2012). "Get Ready for 60% More Potential Customers". Microsoft.
  36. ^ Terry Myerson (February 2012). "Windows Phone at Mobile World Congress 2012". Microsoft.
  37. ^ a b Windows Phone 7.8 Problems: Data-Draining Live Tiles, Lumia Audio Issues | Pocketnow
  38. ^ "Windows Phone 8 update history". Microsoft.
  39. ^ a b "Windows Phone 8 update history". Windows Phone How-to (United States).
  40. ^ "Introducing Windows Phone Preview for Developers". Building Apps for Windows.
  41. ^ "Announcing our third Windows Phone 8 update—plus a new developer preview program". Blogging Windows.
  42. ^ Rubino, Daniel (July 30, 2014). "Microsoft reveals Update 1/GDR1 for Windows Phone 8.1, due next week for Preview users | Windows Phone Central". Retrieved August 21, 2014.
  43. ^ Belfiore, Joe (July 30, 2014). "Windows Phone 8.1 Update brings Cortana to new markets + new featuresBlogging Windows". Retrieved August 21, 2014.
  44. ^ July 31, 2014 Paul Thurrott (July 31, 2014). "Windows Phone 8.1 Update 1/GDR1: Internet Explorer | Windows Phone content from Paul Thurrott's SuperSite for Windows". Archived from the original on August 8, 2014. Retrieved August 21, 2014.
  45. ^ "The Mobile Web should just work for everyone". Microsoft. August 1, 2014. Retrieved December 18, 2014.
  46. ^ "User-agent string changes". Microsoft. Retrieved December 18, 2014.
  47. ^ Surur, Suril (February 16, 2015). "Windows Phone 8.1 GDR2 goes to OEMs, may bring anti-theft mode". Windows Mobile PowerUser.
  48. ^
  49. ^ "Cortana (yes!) and Many, Many Other Great Features coming in Windows Phone 8.1". Blogging Windows.
  50. ^ a b c
  51. ^ Brad Molen. "Windows Phone 8.1 review: Microsoft's mobile OS finally feels whole". Engadget. AOL.
  52. ^ "Windows Phone 8.1 Update brings Cortana to new markets + new features". Blogging Windows.
  53. ^ a b "2.9: Notification - Windows Phone Hardware Development".
  54. ^ "MSDN Blogs". Microsoft.
  55. ^ "Windows Phone 8.1 GDR2 - Windows Phone Hardware Development". Archived from the original on December 22, 2015. Retrieved December 12, 2015.
  56. ^
  57. ^
  58. ^ a b "Hands on with Windows Phone 8.1 Update 2". WMPoweruser.
  59. ^ "The Official Bluetooth SIG Member Website".
  60. ^ Rubino, Daniel. "Windows Phone 8.1 Update 2 also brings MKV video support". Windows Central. Retrieved April 29, 2015.
  61. ^
  62. ^
  63. ^
  64. ^ "Announcing the first build of Windows 10 Technical Preview for Phones". Gabe Aul. February 12, 2015. Retrieved February 12, 2015.
  65. ^ "Windows Phone 10 to be called just Windows 10". GSMArena. Retrieved February 11, 2015.
  66. ^ Bright, Peter (January 24, 2015). "Every Windows Phone 8 phone will get Windows 10, except the ones that won't". Ars Technica.
  67. ^ "Yes, Windows 10 is Coming to Low-End Windows Phones". Petri. February 9, 2015. Retrieved February 11, 2015.