Windows 10 (Feature 2) Build Tracker for Mobile

This page will track all of the Redstone 3, now called Feature 2, Development Branch builds for Mobile that Microsoft ships to testers in the Windows Insider Program.

Redstone 3 the code name for the next major update to Windows 10, is expected to be released sometime in the fall of 2017 but it is unclear what role the updates in the Feature 2 branch will play in that release.

The builds will be listed in this tracker from newest to oldest and all you need to do is click through the gallery images to see information about each released build including how many days it has been since the last build release for Redstone 3 and now Featrure 2.

Track Windows 10 (Redstone 3) Builds for PCs

Note: All update information is courtesy of Microsoft.

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But, wait...there's probably more so be sure to follow me on Twitter and Google+.


 

Slide 1

Windows 10 (Redstone 3) Preview for Mobile Build 15245

Released to Fast Ring: 25 August 2017

Source: Announcing Windows 20 Insider Preview Build 16275 for PC & Build 15245 for Mobile

Days Since Last Fast Ring Build: 16 days (Build 15240)
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Released to Slow Ring:

Source:

​Days Since Last Slow Ring Build:
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Released to Release Preview Ring: 

Source: 

​Days Since Last Release Preview Ring Build:
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What's New
N/A

Improvements and Fixes for Mobile

This build also includes all the improvements from KB4034674.

We fixed an issue where the MTP service would sometimes crash when you disconnected your phone while a file transfer is in progress.

We fixed a spin loop that was occasionally triggered by deleting a VPN profile.

We fixed an issue where apps which call into the firewall (such as Microsoft Edge) have the potential of becoming deadlocked and the app hangs until you reboot your phone.

We fixed an issue in the routing engine used by apps like Maps where the initial direction was always set to North which could result in unnecessary route segments.

We fixed an issue where Silverlight apps that use GPS would either not start or crash.

We fixed an issue where a non-default Messaging app (e.g. Skype) would crash with an Access Denied error when changing Download messages settings.

We fixed an issue where the new Privacy Consent popup would block loading of apps which used the activity detection and pedometer sensors.

We fixed an issue where turning on/off Reset Protection could cause the phone to reboot.

Known Issues for Mobile
N/A


 

Slide 2

Windows 10 (Redstone 3) Preview for Mobile Build 15240

Released to Fast Ring: 09 August 2017

Source: Announcing Windows 10 Insider Preview Build 15240 for Mobile

Days Since Last Fast Ring Build: 07 days (Build 15237)
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Released to Slow Ring: 23 August 2017​

Source: Dona Sarkar via Twitter

​Days Since Last Slow Ring Build: 40 Days (Build 15230)
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Released to Release Preview Ring: 

Source:

​Days Since Last Release Preview Ring Build:
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What's New

Emoji 5.0: Just like we did on PC, we have added support for the latest Unicode updates – including new snacks, actions, dinosaurs, and even fantasy characters like genies, fairies and zombies – to Windows 10 Mobile in this build. They’re all accessible via both the touch keyboard and the Emoji Panel. We’ve tweaked some of our original emoji designs based on your feedback and to improve consistency with how the emoji is displayed on other platforms (while maintaining our Windows style).

Chinese Lunar Calendar: We have received questions about supporting the Chinese Lunar calendar on Windows 10 Mobile. The power of a Universal Windows Platform (UWP) app is that it can run on any Windows-based device. The Calendar UWP app supports the Chinese Lunar calendar on both PC and Mobile.

Improvements and Fixes for Mobile

We fixed the issue where trying to update Windows Store apps saved to your SD card resulted in an 8007000B error. Apps installed on SD cards should update without any issue.

We fixed an issue where there was no icon shown for Windows Update for either new notifications or on the settings page under Settings > System > Notifications & actions.

Known Issues for Mobile

Occasionally, Narrator speaks phrases in English rather than the chosen non-English language.

There is a problem with the HP Elite X3 with wired docks where the portrait orientation setting is lost when the external display is disconnected and reconnected. A workaround for this is to reboot the phone after tapping the “OK” button instead of disconnecting and reconnecting. This workaround must be performed every time you connect to an external display you want to use with Continuum in portrait orientation.

When installing or updating a Windows Store app, you may see error 80070057. As a workaround, you can get the latest app by uninstalling the older version of the app from your device and reinstall latest version from Store.


 

Slide 3

Windows 10 (Redstone 3) Preview for Mobile Build 15237

Released to Fast Ring: 02 August 2017

Source: Announcing Windows 10 Insider Preview Build 16257 for PC & Build 15237 for Mobile

Days Since Last Fast Ring Build: 7 days (Build 15235)
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Released to Slow Ring: 

Source: 

​Days Since Last Slow Ring Build:
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Released to Release Preview Ring: 

Source:

Days Since Last Release Preview Ring Build:
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What's New

N/A

Improvements and Fixes for Mobile

We made some improvements to the Field Medic Store app, where we fixed an issue with collecting Watson crash data, enabled spell checking when editing a report, and updated the PowerOn/PowerOff profiles to include additional battery info.

We fixed an issue where the screen would occasionally flash black after launching or rotating the Camera app.

We fixed an issue with the HP Elite X3 reporting that the SD card had been removed from the device when it had not.

We fixed an issue with Continuum where, after the attached monitor is unplugged, occasionally the mobile LCD does not power off and the mobile battery could be drained.

We fixed an issue with the Windows inbox NFC driver where occasionally the wrong card type data was reported.

We improved the Cortana resume-from-suspend behavior to enable a Cortana skill to be authenticated before the user interacts with the skill.

We fixed an issue with the behavior of the hardware search button in countries where Cortana is not available. In this case, the OEM provides the search app or URI.

Known Issues for Mobile

There is a problem with the HP Elite X3 with wired docks where the portrait orientation setting is lost when the external display is disconnected and reconnected. A workaround for this is to reboot the phone after tapping the “OK” button instead of disconnecting and reconnecting. This workaround must be performed every time you connect to an external display you want to use with Continuum in portrait orientation.

If you have apps saved to your SD card, you may see error 8007000B when trying to update those apps. As a workaround, you can move these apps to internal memory, update them, and then move them back to your SD card. Thank you to all the Insiders who reported this to us!

When installing or updating a Windows Store app, you may see error 80070057. As a workaround, you can get the latest app by uninstalling the older version of the app from your device and reinstall latest version from Store.


 

Slide 4

Windows 10 (Redstone 3) Preview for Mobile Build 15235

Released to Fast Ring: 26 July 2017

Source: Announcing Windows 10 Insider Preview Build 16251 for PC & Build 15235 for Mobile

Days Since Last Fast Ring Build: 13 days (Build 15230)
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Released to Slow Ring: 

Source: 

​Days Since Last Slow Ring Build:
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Released to Release Preview Ring: 

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​Days Since Last Release Preview Ring Build:
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What's New

Switch to portrait mode orientation in Continuum

Improvements and Fixes for Mobile

This build also includes all the improvements from KB4025342.

We fixed an issue where downloading large apps could report out of disk space when there is sufficient space available.

We fixed an issue where installing apps (particularly games) from the Windows Store would sometimes fail with “Error, see details”.

We fixed an issue where a device could not be unlocked after removing/turning off Windows Hello.

We fixed an issue where Cortana would not provide the region when saying “Your region is set to” and then “Is that right?”.

We fixed a Turkish localization issue where the string “We need to fix your Microsoft account before you can use shared experiences …” was shown in English.

Known Issues for Mobile

There is a problem with the HP Elite X3 with wired docks where the portrait orientation setting is lost when the external display is disconnected and reconnected. A workaround for this is to reboot the phone after tapping the “OK” button instead of disconnecting and reconnecting. This workaround must be performed every time you connect to an external display you want to use with Continuum in portrait orientation.


 

Slide 5

Windows 10 (Redstone 3) Preview for Mobile Build 15230

Released to Fast Ring: 13 July 2017

Source: Announcing Windows 10 Insider Preview Build 16241 for PC + Build 15230 for Mobile

Days Since Last Fast Ring Build: 15 days (Build 15228)
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Released to Slow Ring: 28 July 2017

Source: Various Blogs/Twitter

​Days Since Last Slow Ring Build: 15 Days (Build 15223)
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Released to Release Preview Ring: 

Source:

​Days Since Last Release Preview Ring Build:
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What's New

N/A

Improvements and Fixes for Mobile

We fixed an issue where VPN profile appeared to be always ON.

We fixed a notification issue between the Bluetooth Support Service and device background services for fitness bands.

We fixed issues with Caller ID matching in Japan & Denmark.

Known Issues for Mobile

N/A


 

Slide 6

Windows 10 (Redstone 3) Preview for Mobile Build 15228

Released to Fast Ring: 28 June 2017

Source: Announcing Windows 10 Insider Preview Build 16232 for PC + Build 15228 for Mobile

Days Since Last Fast Ring Build: 7 days (Build 15226)
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Released to Slow Ring: 

Source: 

​Days Since Last Slow Ring Build:
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Released to Release Preview Ring: 

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Days Since Last Release Preview Ring Build:
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What's New

N/A

Improvements and Fixes for Mobile

We have fixed notifications (SMS, Calendar) with all Fitbit trackers.

We have fixed crashes reported while using Photos app.

We have fixed a deployment issue in where if an admin uses ActiveSyncCSP to provisioning email account on device running the Windows 10 Creators Update without providing a valid password, and the email server enforces a limited number of denied access retries, then the server will lock out the email account.

We have improved battery performance by fixing a bug in a scenario where 30% more power was used during Camera app preview and capture mode.

Some Insiders provided feedback that playing video on phone resulted in a black flash and/or stuttering when in landscape mode. We have fixed this issue.

We have improved Bluetooth connectivity with Garmin Wearable devices.

General improvement in reliability of phones by fixing top crash issues.

Known Issues for Mobile

N/A


 

Slide 7

Windows 10 (Redstone 3) Preview for Mobile Build 15226

Released to Fast Ring: 21 June 2017

Source: Announcing Windows 10 Insider Preview Build 15226 for Mobile

Days Since Last Fast Ring Build: 8 days (Build 15223)
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Released to Slow Ring: 

Source: 

​Days Since Last Slow Ring Build:
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Released to Release Preview Ring: 

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Days Since Last Release Preview Ring Build:
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What's New

N/A

Improvements and Fixes for Mobile

This build also includes all the improvements from KB4022725.

We fixed an issue where some apps could not subscribe to SMS receive notifications.

We fixed an issue for Windows Insiders where some binaries stopped working when transitioning from Insider Preview builds to officially released builds.

We fixed an audio issue with Bluetooth headphones after Cortana reads an incoming SMS message to the user.

Known Issues for Mobile

In some cases, the WeChat app may crash on launch


 

Slide 8

Windows 10 (Redstone 3) Preview for Mobile Build 15223

Released to Fast Ring: 13 June 2017

Source: Announcing Windows 10 Insider Preview Build 15223 for Mobile

Days Since Last Fast Ring Build: 5 days (Build 15222)
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Released to Slow Ring: 21 June 2017

Source: Windows Update on Windows 10 Mobile

Days Since Last Slow Ring Build: 13 Days (Build 15215)
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Released to Release Preview Ring: 

Source:

​Days Since Last Release Preview Ring Build:
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What's New

N/A

Improvements and Fixes for Mobile

We fixed an issue where only the first VPN profile was being displayed in the VPN settings page via Settings > Network & wireless > VPN.

We fixed an issue where a meeting Time Zone was garbled in Chinese or Japanese.

Based on Insider feedback, we have changed “Phone Update” to “Windows Update” under Settings > Update & security.

Known Issues for Mobile

In some cases, the WeChat app may crash on launch.


Slide 9

Windows 10 (Redstone 3) Preview for Mobile Build 15222

Released to Fast Ring: 08 June 2017

Source: Announcing Windows 10 Insider Preview Build 16215 for PC + Build 15222 for Mobile

Days Since Last Fast Ring Build: 23 days (Build 15215)
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Released to Slow Ring: 

Source: 

​Days Since Last Slow Ring Build:
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Released to Release Preview Ring: 

Source:

Days Since Last Release Preview Ring Build:
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What's New

N/A

Improvements and Fixes for Mobile

This build also includes all the improvements from KB4016871 and KB4020102.

The copyright date is correctly showing 2017 now under Settings > System > About.

We fixed an issue where WhatsApp would not launch after updating to the latest Mobile builds.

We fixed an issue with using the Japanese 12 Key soft keyboard where the “right arrow” key did not input a space

We fixed an issue with the Bulgarian keyboard localization for the HP Lap Dock in Continuum.

We have further improved the reliability of notifications for apps with a paired Bluetooth device, such as Fitbit.

Improved the Time & Language settings page UX for Speech and Keyboard language downloads. Previously, the status would show “Downloading” for speech and “Installing” for keyboard. Unless, the user tapped on the language or navigated to the Update & Security settings page, there was no indication that a restart is required to complete the installation. Now when the update reaches the reboot pending state, a “Restart Required” is displayed under the language.

We fixed several enterprise device management issues.

We fixed an issue where notifications and Cortana’s cross-devices settings on your device were not being mirrored to your PC.

Known Issues for Mobile

In some cases, the WeChat app may crash on launch.


 

Slide 10

Windows 10 (Redstone 3) Preview for Mobile Build 15215

Released to Fast Ring: 17 May 2017

Source: Announcing Windows 10 Insider Preview Build 16199 for PC + Build 15215 for Mobile

Days Since Last Fast Ring Build: 6 days (Build 15213)
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Released to Slow Ring: 08 June 2017

Source: Microsoft

​Days Since Last Slow Ring Build: N/A - First Slow Ring Build of Feature 2
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Released to Release Preview Ring: 

Source:

​Days Since Last Release Preview Ring Build:
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What's New

N/A

Improvements and Fixes for Mobile

We fixed an issue where the Battery Settings page caused the device to become unresponsive and appear to have hung.

We fixed a general issue where certain background tasks were being incorrectly starved under resource contention. This issue would impact music and video playback.

Under low memory conditions, additional app launches will cause the OS to run out-of-memory and the device will restart unexpectedly to recover. This fix detects the condition and blocks app launches until memory is freed up.

We fixed an issue with Microsoft Edge which prevented the phone from entering Connected Standby which caused battery drain.

We fixed an issue where the word auto-correction service would crash.

We fixed 2 issues causing the device screen to stay off when unplugging from the Continuum dock after screen has timed out normally requiring the device to be rebooted to recover.

We fixed an issue with the Notifications Settings page which made the UI appear unresponsive.

We fixed an Enterprise MDM issue where the policy could hide all pages except the Work Access page.

Known Issues for Mobile

The copyright date is incorrect under Settings > System > About. It shows as 2016 when it should be 2017. Thanks to the Windows Insiders that reported this!

In some cases, the WeChat app may crash on launch.


Slide 11

Windows 10 (Redstone 3) Preview for Mobile Build 15213

Released to Fast Ring: 11 May 2017

Source: Announcing Windows 10 Insider Preview Build 16193 for PC + Build 15213 for Mobile

Days Since Last Fast Ring Build: 7 days (Build 15210)
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Released to Slow Ring: 

Source: 

​Days Since Last Slow Ring Build:
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Released to Release Preview Ring: 

Source:

​Days Since Last Release Preview Ring Build:
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What's New

N/A

Improvements and Fixes for Mobile

We fixed an issue where the Battery Settings page caused the device to become unresponsive and appear to have hung.

We fixed a general issue where certain background tasks were being incorrectly starved under resource contention. This issue would impact music and video playback.

Under low memory conditions, additional app launches will cause the OS to run out-of-memory and the device will restart unexpectedly to recover. This fix detects the condition and blocks app launches until memory is freed up.

We fixed an issue with Microsoft Edge which prevented the phone from entering Connected Standby which caused battery drain.

We fixed an issue where the word auto-correction service would crash.

We fixed 2 issues causing the device screen to stay off when unplugging from the Continuum dock after screen has timed out normally requiring the device to be rebooted to recover.

We fixed an issue with the Notifications Settings page which made the UI appear unresponsive.

We fixed an Enterprise MDM issue where the policy could hide all pages except the Work Access page.

Known Issues for Mobile

The copyright date is incorrect under Settings > System > About. It shows as 2016 when it should be 2017. Thanks to the Windows Insiders that reported this!

In some cases, the WeChat app may crash on launch.


 

Slide 12

Windows 10 (Redstone 3) Preview for Mobile Build 15210

Released to Fast Ring: 04 May 2017

Source: Announcing Windows 10 Insider Preview Build 16188 for PC + Build 15210 for Mobile

Days Since Last Fast Ring Build: 10 days (Build 15208)
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Released to Slow Ring: 

Source: 

​Days Since Last Slow Ring Build:
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Released to Release Preview Ring: 

Source:

​Days Since Last Release Preview Ring Build:
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What's New

N/A

Improvements and Fixes for Mobile

We fixed an issue with the Glance screen where the time was not updating.

We fixed the token issue so when your device syncs to the service, text messages should show back up.

Known Issues for Mobile

The copyright date is incorrect under Settings > System > About. It shows as 2016 when it should be 2017. Thanks to the Windows Insiders that reported this!

In some cases, the WeChat app may crash on launch.


Slide 13

Windows 10 (Redstone 3) Preview for Mobile Build 15208

Released to Fast Ring: 24 April 2017

Source: Announcing Windows 10 Insider Preview Build 16184 for PC + Build 15208 for Mobile

Days Since Last Fast Ring Build: 4 days (Build 15207)
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Released to Slow Ring: 

Source: 

Days Since Last Slow Ring Build:
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Released to Release Preview Ring: 

Source:

​Days Since Last Release Preview Ring Build:
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What's New

N/A

Improvements and Fixes for Mobile

We’ve fixed the issue where some Insiders were unable to open both the Connect UX page and/or the “Add Bluetooth or other devices” setting on the Bluetooth Settings page.

We fixed an issue resulting in an unexpected extra ~20 sec being added to the phone shutdown process due to a deadlock if you tried to shut down soon after switching from one network to another.

Known Issues for Mobile

A small percentage of devices may experience text message backup loss related to backup and recovery of the messaging database.

The copyright date is incorrect under Settings > System > About. It shows as 2016 when it should be 2017. Thanks to the Windows Insiders that reported this!

Insiders may experience random shutdowns on some devices.

In some cases, the WeChat app may crash on launch.


Slide 14

Windows 10 (Redstone 3) Preview for Mobile Build 15207

Released to Fast Ring: 24 April 2017

Source: Announcing Windows 10 Insider Preview Build 15207 for Mobile

Days Since Last Fast Ring Build: 5 days (Build 15205)
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Released to Slow Ring: 

Source: 

​Days Since Last Slow Ring Build:
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Released to Release Preview Ring: 

Source:

Days Since Last Release Preview Ring Build:
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What's New

We have added a privacy page to the Windows 10 Mobile OOBE and upgrade experiences that allows you to quickly and effectively make common privacy changes while setting up the device. However, Insiders have reported that their device would crash or reboot shortly after unlocking their device for the first time after the upgrade if their device did not have a password configured to unlock the device. After updating to Build 15207, you will see this privacy page one more time – but should no longer experience a crash or reboot.

Improvements and Fixes for Mobile

N/A

Known Issues for Mobile

N/A


Slide 15

Windows 10 (Redstone 3) Preview for Mobile Build 15205

Released to Fast Ring: 19 April 2017

Source: Announcing Windows 10 Insider Preview Build 16179 for PC + Build 15205 for Mobile

Days Since Last Fast Ring Build: 5 days (Build 15204)
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Released to Slow Ring: 

Source: 

​Days Since Last Slow Ring Build:
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Released to Release Preview Ring: 

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​Days Since Last Release Preview Ring Build:
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What's New

Nothing noted.

Improvements and Fixes for Mobile

We fixed the targeting issue that caused some variants of the Alcatel IDOL 4S to not receive Build 15204 last week. All variants of the Alcatel IDOL 4S should receive Build 15205.

FYI: We fixed the issue where supported Windows 10 Mobile devices were showing the update to the Windows 10 Anniversary Update as “not yet available” in the Upgrade Advisor app.

We fixed an issue where Continuum would stop working when HP Elite X3 case is closed.

We fixed an issue where Continuum would hang or render incorrectly after disconnecting on devices like the Lumia 950.

We fixed an issue with Microsoft Edge where you might get into a bad state after opening a new Microsoft Edge windows and screen off with the JIT process suspended.

We fixed an issue with where the device screen might stay black when disconnecting from a Continuum dock after screen has timed out normally.

We fixed an issue with backup and restore which impacts users with slower network connection.

We fixed an issue around Microsoft Edge reliability.

Known Issues for Mobile

A small percentage of devices may experience text message backup loss related to backup and recovery of the messaging database.

For Insiders who have upgraded from a prior 150xx build to this build, the “Add Bluetooth or other devices” Settings page and the Connect UX page may fail to open.

The copyright date is incorrect under Settings > System > About. It shows as 2016 when it should be 2017. Thanks to the Windows Insiders that reported this!

Insiders may experience random shutdowns on some devices.


Slide 16

Windows 10 (Redstone 3) Preview for Mobile Build 15204

Released to Fast Ring: 14 April 2017

Source: Announcing Windows 10 Insider Preview Build 16176 for PC + Build 15204 for Mobile

Days Since Last Fast Ring Build: None as this is the first build released for Mobile devices from Redstone 3 Development Branch
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Released to Slow Ring: 

Source: 

​Days Since Last Slow Ring Build:
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Released to Release Preview Ring: 

Source:

​Days Since Last Release Preview Ring Build:
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What's New

Only the following Windows 10 Mobile devices are supported for Redstone 3 moving forward:

-- HP Elite x3
-- Microsoft Lumia 550
-- Microsoft Lumia 640/640XL
-- Microsoft Lumia 650
-- Microsoft Lumia 950/950 XL
-- Alcatel IDOL 4S
-- Alcatel OneTouch Fierce XL
-- SoftBank 503LV
-- VAIO Phone Biz
-- MouseComputer MADOSMA Q601
-- Trinity NuAns NEO

Devices not on this list will not officially receive the Windows 10 Creators Update nor will they receive any future builds from our Development Branch that we release as part of the Windows Insider Program. However, Windows Insiders who have devices not on this list can still keep these devices on the Windows 10 Creators Update at their own risk knowing that it’s unsupported.

Improvements and Fixes for Mobile

We have added a new privacy page to the Windows 10 Mobile OOBE experience that allows you to quickly and effectively make common privacy changes while setting up the device. You can read more about our Windows 10 privacy journey here.

We fixed the issue where the keyboard would sometimes not appear when a text input field is selected in Microsoft Edge.

Known Issues for Mobile

For Insiders who have upgraded from a prior 150xx build to this build, the “Add Bluetooth or other devices” Settings page and the Connect UX page may fail to open.

Some users are reporting that pages are constantly reloading or refreshing, especially while they are in the middle of scrolling them in Microsoft Edge. We’re investigating.

There is an issue with Microsoft Edge where you might get into a bad state after opening a new Microsoft Edge windows and screen off with the JIT process suspended.

Continuum will stop working when HP Elite X3 case is closed.

Continuum hangs or renders incorrectly after disconnecting on devices like the Lumia 950.

The device screen might stay black when disconnecting from a Continuum dock after screen has timed out normally.

 

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