1. AC Question's Avatar
    after starting the call, the screen display turns off when trying to turn on the speaker or any other option
    09-10-2015 04:47 PM
  2. Naxow's Avatar
    the display turn off is triggered by a proximity sensor, usually near the upper right corner (front view) of phones, this is done to avoid pressing buttons while the phone is near your face. If you are keeping a distance with your phone and it activates, it may seem due to a sensor malfunction.

    Has your phone recently suffered any damage or have you downloaded any unusual app?
    09-13-2015 06:46 PM

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