Hello, My iPhone 6 (64G) has had screen issues involving flickering and the appearance of vertical line distortions on the screen, which then turns black for a moment, then returns to normal. It's sort of like the phone is "fainting ," then coming to. I suspect it may have been caused by overheating, even though the problem has occurred when the phone wasn't being charged. I also suspect one of my apps could be causing this, specifically my "Free Ram" app; yesterday I deleted and reinstalled Free Ram, and now I don't seem to be having screen issues, even though it's really too soon to tell. Several years ago the app was updated to support 64 bit CPU. (Maybe the original download supported 32?) I would appreciate your help!