One tip. I had a screen protector fitted to my I phone X which covered the " notch " and obviously the sensor. This caused major problems with the screen staying black after making a call and if the other person did not terminate the call it remained connected ! This did not happen after every call made, on average after approximately one in 6 - 10 calls this happened. Very frustrating. I don't have the name of that screen protector but have had a new one fitted with a cut out for the notch and have not experienced the problem again.
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