- Why screen turns your Nokia Lumia phone me to black during a call:
There is a phone to your Nokia Lumia near the sensor is located next to the Nokia logo on the right side of the front of the phone interface. When you make a call, the proximity sensor turns off the touch screen to prevent unintended clicks. If you are using a tool to protect the screen unlike the Nokia-backed covering the proximity
sensor, it will not work correctly. Remove the tool screen protection is not supported by Nokia or Cut the upper part of which do not even cover the proximity sensor.
You can do the following steps to check the problem:
Make a call or received with the phone.
Once there is a call in progress, put your hand over the proximity sensor by 1 cm and the screen will be turned off.
Remove your hand over the proximity sensor function, and will run the screen again.
Repeat steps 1,2,3 test three times to make sure the proximity sensor function.
