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Here are the fixes, improvements, and known issues in Windows 10 Mobile build 15031

Just a day after releasing the build for PCs, Microsoft released Windows 10 Mobile build 15031 to the Fast ring. The build was extremely light on new features, introducing only a new Share icon and nothing else.

As usual, there's a long list of fixes, improvements, and known issues. Here's what got fixed in Windows 10 Mobile build 15031:

  • We fixed an issue in recent Insider builds where certain calendar appointments could result in a Mail crash with every sync. This issue could also result in issues sending and receiving SMS.

  • We fixed an issue where pausing a streaming track, for example in Groove Music, would result in no more re-buffering when playback is resumed, leading to choppy playback audio.

  • We fixed an issue where text copied from a PDF in Microsoft Edge couldn’t be pasted.

  • We fixed an issue where the ninja cats on the People and Animals page of the keyboard were displaying in two characters on the keyboard instead of the expected one.

  • We also added the rainbow flag emoji to the keyboard. You can find it in the transportation and weather section.

  • We’ve updated Keyboard Settings so that “Switch back to letters after I type an emoticon” is now off by default.

  • We fixed an issue where Microsoft Edge might sometimes unexpectedly not rotate into landscape mode.

  • We fixed an issue where, if the phone was connected to the PC, deleting an entire folder (without opening the folder) on the phone from the PC’s file explorer might not result in the folder actually being deleted on the phone. We also fixed an issue where (still connected to the PC) the phone might freeze for a short while after cancelling copying content to the SD card.

  • We fixed an issue resulting in some games with an explicit option to “exit game” unexpectedly taking a long time to close.

  • We fixed an issue resulting in some games were drawing up and to the left offscreen in recent flights.

  • We fixed an issue where receiving a notification while the phone was in your pocket could unexpectedly result in the screen turning on.

  • We’ve improved reliability when handling malformed Gifs in XAML-based apps.

Here are the known issues:

  • Speech packs will be unable to download on this build.
  • Adding a new card / paying with an existing card will not work in Microsoft Wallet.
  • Going to Settings > Devices will crash the Settings app. You will be unable to pair a Bluetooth device. Bluetooth quick actions from Action Center also does not work. Continuum will also not work.

You should always be aware of the known issues before installing a new Insider Preview build. Speech packs weren't able to download in the last build either, but they do work. This could be an issue for many users; for example, if you're a Lumia 930 in the US, you need a speech pack. The workaround here would be to make sure that you have the speech pack before upgrading.

Adding cards and paying with Microsoft Wallet won't be a big deal to too many people, as the service is only supported by a handful of banks and a very limited amount of hardware.

If you're on the Fast ring, you can grab 15031 by heading to Settings -> Update & security -> Phone update. If you're not, go to the Windows Insider Program tab and tap 'Get started'. When your handset reboots, go back and make sure that you're set to the Fast ring.

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