This is an important feature, can't be disabled. During call, if you put your device next to your ear, the screen will be disabled to avoid unintentional taps!
Thanks my problem is how i can control my mobile with this i cant open speaker , i cant open mobile for send anything during call before call end more android mobile disable this or have setting to disable it as option and this also happens when i play any sound massage in whatsapp the screen black It's really annoying please tell me if you have solution
During call, just remove your phone from your ear and display will turn on again. Be sure to not cover the upper part of the display, where the proximity sensor is located.