Fix Blank screen while receiving calls in Android Lollipop

The display staying blank while receiving calls is a frequent problem plaguing Android users who have recently updated their device to Lollipop 5.0 (Android L) or 6.0 Marshmallow. KitKat 4.4 and Jellybean 4.3 users might also face similar “black screen on call” issue, if they recently fiddled with the call notification settings of their devices. When your phone is idle, the screen sleeps but it should wake up when you get a call. Due to this bug, when there’s an incoming call you can hear the ringtone playing but the display remains blank, so you can’t see who is calling without pressing the power button to unlock the screen. Here is how you can fix this issue:

First, check for updates. If new firmware or new version of Android OS is available, install it. To check for updates Go to Settings >> About Phone >> System Updates >> You will be notified if there’s an update available >> Proceed with the update. That should get rid of this bug. If you have already installed the latest OS on your device but are still having this issue, follow these steps:

1. Go to Settings >> Sounds and notification >> Interruptions 
2. You will see “When calls and notifications arrive” option >> Select “Always interrupt” (alternatively, select ‘allow priority interruptions only’). 
3.  Now from “Priority interruptions” >> Turn on “Calls”
4.  Reboot your device 
5. |Do a test call to see if you smarphone’s display turns on when receiving a call. 

Some devices recently affected by this display settings bug include HTC Desire C, One Plus One, Moto G, Nexus 5 , Sony Xperia Z3, Yu Yureka On some devices running custom ROMS like Cynogenmod, this might be a calibration issue of the proximity sensor. Check your screen protector- if its low quality or dirty, it might be affecting the proximity sensor. If you run CM 12 or similar custom ROM, try this fix: How to fix screen going blank in Cynogenmod 12.