proximity sensor not working in lumia 535

[WPCentral Question]

after upgrading Windows 10 10549 Tech preview proximity sensor is not working please Help me

 

[xandros9]

try a hard reset, and if that don't work, the Windows Device Recovery Tool to roll back to 8.1

If either of those fails to fix your issue, make sure the face of the device is clean with nothing on it. Actually, try this first.