This started to happen on my S7 after I did the recent download of new software. Couldn't find a work around. Had to keep touching part of the screen to keep it from going completely black. Kind of hard to keep an eye on my phone as I am always on bluetooth and doing other things at my desk. I can't keep constantly watching my phone to keep it awake while I'm taking an order. Very frustrating and it seems to be a bug in the lastest software update. I have gone through all the clear cahce, reset, and clear data "fixes" i can find and nothing has changed. Guess the Sumsung guru's need to go back to the drawing board and get a fix out quick.
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