Has any of you experience non stop screen flickering, were the only way to stop it is to remove the battery and reboot the phone? I've experienced it multiple times. Today was after i made a call, hung up before completing said call and turned off the screen by pressing the power button. Right after I received a phone call and I pressed a power button to wake up the phone, but it started flickering and I could not do anything. Any information of how to avoid it in the future would be appreciated. Maybe I need to free up memory somehow?
I have not experienced flickering, however pressing the power button when the phone wakes from sleep due to alarm, SMS, and in your case call has not been that smooth. It is slow to react (maybe fingerprint reader related) and bringing up the phone after sleep.
Happens sometimes to mine. Have to hold Power for about 10 seconds until start screen shows. Seems to be something to do with me accidentally locking it or similar.