Here's what got fixed and what's still broken in Windows 10 Mobile build 14393

We"re just two weeks away from the Windows 10 Anniversary Update now, which means that Microsoft is cranking out Insider Preview builds. Today saw the release of build 14393 for PC and Mobile to the Fast ring.

As we haven"t seen new features in a Mobile build in some time, 14393 is no different. Of course, with the Anniversary Update so close, today"s build focuses on fixes and improvements.

Here"s what got fixed and improved in Windows 10 Mobile build 14393:

  • We fixed an issue resulting in rapid battery drain when Visual Voicemail syncs voicemail messages on Dual SIM devices like the Lumia 950 XL.

  • We also fixed an issue causing some battery drain on older devices like the Lumia 535, 640, 735, 830, 930 and Icon.

  • We fixed the issue causing Voice Recorder to not show up consistently as an option for Call Recording. A app update was released last Friday that fixes this issue. Make sure you have the app version 10.1607.1931.0.

  • We fixed several issues impacting Dual SIM capabilities. Using a device with two SIMs should work as it should.

Here are the known issues:

  • We are continuing to investigate W-Fi issues on certain devices.

  • Turning off Bluetooth can sometimes result in freeze, crash, or reset. See this forum post for more details.

  • Wallet users are prompted for a PIN twice when using tap to pay from a locked phone. You can enter their PIN twice and tap as usual once the phone is unlocked. A fix for this will come as a Wallet app update via the Store.

  • REMINDER: We have changed the backup format for Windows 10 Mobile devices to reduce the size of the backup stored in OneDrive. As a result, if you do a backup on a device running the latest Windows 10 Mobile Insider Preview builds and move back to the released version of Windows 10 Mobile (Build 10586) and restore from your backup – your Start screen layout won’t restore and remain the default Start layout. Your previous backup also gets overwritten. If you need to go back to Build 10586 temporarily, once you are on Build 10586 you should disable backup so it doesn’t overwrite the good backup from Windows 10 Mobile Insider Preview builds. We will stop noting this going forward.

You might notice that 14393 actually has more known issues than last week"s 14390, which had three. Also, the Voice Recorder issue from 14390 has been fixed (as you can see above), so there are actually two new known issues today.

Many are saying that build 14393 is the RTM build, which would mean that it"s the build that non-Insiders will get as the Anniversary Update. It"s possible, but it certainly appears that Microsoft still has a couple things to fix.

If you"re on the Fast ring, you can grab build 14393 by going to Settings -> Update & security -> Phone update -> Check for updates. If you"re not and you want to be, download the Windows Insider app and set it to Insider Fast.

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Here are the fixes, improvements, and known issues in Windows 10 for PCs build 14393