Microsoft has released a new Windows 10 Mobile Insider Preview build, bumping the phones up to build 10586.71



From Windows Central:

A full list of fixes includes:

Windows Update performance and reliability improvements
Improvements in migration of data profiles and messaging settings when upgraded from Windows Phone 8.1.
SensorCore API's are now upgraded correctly from Windows Phone 8.1; allowing applications, including many fitness applications, to correctly access movement data.
SD card detection has been improved on boot and after insertion; File Explorer now handles the removal of an SD card when the default for apps or photos are set to SD.
Improvements in the Edge browser, including PDF rendering.
Bluetooth improvements when re-connecting to all ready paired devices and cars; turn by turn directions, and when using Cortana with the Microsoft Band.
Improvements in Settings when downloading Maps or changing Quick Settings.
Reinstalling Groove Music from the Windows Store no longer causes DRM music playback issues. Groove Music local song collections are now more quickly imported within the application
Device power improvements after listening to music, after missed phone calls when iris detection is disabled, and when downloading updates.
In app purchases now work correctly when cellular data is disabled.
Improvements to the reliability of Kids Corner.

  Microsoft releases Windows 10 Mobile Insider Preview build 10586.71 to Fast Ring members