Microsoft is releasing Build 10052 of the Windows 10 Technical Preview for phones to the Fast ring today. This build is a minor update from the 10051 build that we released 11 days ago with several of the top issues affecting Insiders fixed.

Here are the big things that Microsoft fixed:

• Flight mode can now be enabled.
• You can now disable data connections.
• The bug in which your phone’s MMS settings were lost after upgrading from Build 9941.
• The issue in which you couldn’t download keyboards for additional languages.
• The issue where the viewfinder in the Camera app gets composed incorrectly on some devices like the Lumia 1020.

Micrtosoft said it received reports of failures on a small number of Lumia 520 devices from Windows Insiders at the end of last week when trying to roll back to Windows Phone 8.1 using the Windows Phone Reset Tool. The company paused build availability for these devices to investigate the issue. The issue causing these failures was the way in which the Windows Phone Reset Tool was re-flashing these devices. An update to the Windows Phone Reset Tool was released, that should get those impacted by the issue up and running.