Swipe navigation in Microsoft Edge. Swipe from anywhere on the page to get back to your previous page.
Apps for websites, to redirect certain websites to open with an app instead.
Feedback Hub improvements.
Bug fixes
Fixed an issue causing installation of mobile builds to fail with Error 80070002
Language and Speech Packs should download without any errors.
Fixed the issue causing DRM-protected content from services like Groove Music, Microsoft Movies & TV, Netflix, Amazon Instant Video or Hulu to fail on playback with 0x8004C029 or 0x8004C503 errors.
Fixed the issue where some users with some non-English keyboards were not able to enter letters such as w, y, and a when typing into the address bar of the Edge browser.
Fixed the issue causing your phone to lock up and reboot when it receives a notification from an app that has “Keep notifications private on the lock screen” turned on under Settings > System > Notifications & actions.
Increased font size and improved spacing of the data migration page after receiving an update.
Polished icons used to identify pages in the Settings app – in particular, updated battery icon to be more consistent with the weight of the other icons.
Improved performance when retrieving updated GPS coordinates while driving.
Goodbye message on shutdown will now remain visible until the last moment, to make it easier to determine when your device is off.
Polished the look of media controls on the Lock screen. When the user presses one of the media control buttons, it appears “pressed”.
Fixed an issue where some apps, including Tweetium, would crash on launch.
Fixed an issue where Action Center’s context menus would appear in the wrong orientation if the app underneath was in landscape mode.
Fixed an issue where Lumia 435, 532, 535 and 540 would fail to record video, as well as an issue where advanced camera settings were not preserved when taking a photo with the Lumia 435, resulting in the photo being taken with default settings instead.
Fixed an issue where the same device might be listed multiple times under Connect.
Fixed an issue where quickly pressing the power button twice when Windows Hello is enabled could result in the display appearing stuck off.
Fixed the issue where Groove Music might show an error saying “Can’t play – Another app is controlling your sound right now”.
When delayed lock is setup, Windows Hello will now say “Swipe up to dismiss the lock screen”, rather than looking for your iris.
Fixed an issue where Glance wouldn’t be displayed when hovering hand over proximity sensor.
Fixed an issue where multiple UWPs might start crashing on launch after getting stuck on their splash screen.
Reliability, performance and stability improvements.
Support for Visual Voicemail on Dual SIM phones.
Improvements for Bluetooth connectivity, including the reliability of connecting to and staying connected with Bluetooth devices.
Fix for a problem that caused audio playback to get occasionally interrupted in Groove Music and other music apps when phone display was turned off.
Improvements for Microsoft Edge browser, including support for configuring a prompt before a file download occurs, support for background downloads, and a fix for a problem where opening a link from an another app wouldn’t load the web page.
Reliability improvements for Cortana reading text messages aloud and usability improvements for Quiet Hours feature.
Improvements for Store reliability, including a fix for a problem that prevented some apps from being updated and installed.
Fix for a problem that occasionally caused some apps to show blank tiles after upgrading from Windows Phone 8.1.
Improvements for PC connectivity via USB on some phones that were upgraded from Windows Phone 8.1.
restore from a backup, and have your apps installed and restored appropriately.
leaving blank grey titles on Start.
new languages and keyboards were not downloading
Microsoft Band, and syncing should work again.
The Gadgets app will not detect the Microsoft Display Dock on phones running Windows 10 Mobile Insider Preview builds, and thus cannot update the firmware version. If you have a dock which has already been updated to version 4 then this will not affect you. If you have a dock that has not been updated, then you may experience some minor issues with USB-C stability. You will still be able to use your dock and Continuum.
Upgrading existing Windows Phone 8.1 devices to Windows 10 Mobile
Windows 10 Mobile Update available for Windows Phone 8.1
You can see the current list of Windows Phone 8.1 devices that are supported for the upgrade to Windows 10
List of Phones and devices that can upgrade to Windows 10:
Lumia 1520, 930, 640, 640XL, 730, 735, 830, 532, 535, 540, 635 1GB, 636 1GB, 638 1GB, 430, 435, BLU Win HD w510u, BLU Win HD LTE x150q, MCJ Madosma Q501
Windows 10 Mobile Latest preview and release version 10.0.10586.164 Available
Bug fixes
Faster saving of screenshots
Smoother video playback
Opening of PDF files in Edge improvements
Improvements for the reliability of app notifications, including text messages and alarms not ringing as scheduled.
Improvements for text message backup to reduce data and battery usage.
Fixes for Microsoft Edge with address bar suggestions showing late or persisting during navigation, “Close all tabs” not closing all tabs, and Word * Flow on the address bar not functioning as expected.
Fix for a problem where the Microsoft account was not detected by the Outlook Mail, Outlook Calendar and People app. Attempting to add a new contact in this state caused the People app to crash for some users.
Fix for a problem that caused the Wi-Fi connection to temporarily switch off after prolonged use for some users.
Fix for a problem that caused first-party app updates to fail to install successfully for some users, leaving the apps in state where they cannot be launched.
Improvements for battery usage, Bluetooth connectivity, and OS reliability.
Windows 10 Mobile Latest preview version 10.0.14267.1004 Build 14267.1004 Available Improvement and Bug fixes
Issue fixed where the Lumia 550 no longer charges or connects via USB.
Improvements in Visual Voicemail notifications.
Introducing Visual Voicemail for dual-SIM devices such as dual-SIM Lumia 950 XL!
Improvements in History feature for application update, contact you communicate, Skype messages, email and more.
Improvements app pinned to Start.
issues connecting to wireless displays.
using Continuum on the Lumia 950 XL – the trackpad experience is not working correctly.
Note
Initially making new mobile builds from our Development Branch available only to devices that shipped with Windows 10 Mobile. Currently this includes the Lumia 950, 950 XL, 650, 550, and Xiaomi Mi4. Today we are also adding support for the ALCATEL ONETOUCH Fierce XL.
Windows 10 Mobile Latest preview version 10.0.14267.1002 Build 14267 Available for Fast ring
General user experience
Music search button is now accessible from Cortana's main screen
Word Flow now works in the address bar of Edge
Added a button to open an InPrivate tab in the tab view of Edge
Added a menu item to close only InPrivate tabs
Added a download manager to Edge and improved prompts to save or cancel downloads
The ability to attach photos, videos, location, contact, voice note, or ringtone to Skype messages in the Messaging + Skype app
Skype "Mojis" added to Messaging + Skype app
Bug fixes
Fixed an issue where shape writing would ignore every second word when typing into a text box on a website in Microsoft Edge.
After installing the Polish keyboard, typing a word that should be accented now offers the recommended accented word.
Resolved an issue where you could not hide the navigation bar in Windows Phone 8.1 apps.
Fixed an issue where videos recorded onto SD memory cards would result in a large number of dropped frames.
Improved app launch reliability and certain crashes that were causing the phone to reboot are also fixed.
More polished the Live tile animations and improved logic for refreshing Live tiles.
Reliability improvements for keyboards with large dictionaries
Rollout Notes
First build with a limited rollout to Insiders with a Lumia 950, 950 XL, 550, 650, or Xiaomi Mi4. These devices either shipped with Windows 10 Mobile or in the case of Xiaomi Mi 4, have Windows 10 Mobile through flashing a ROM over Android, the shipping OS.