Red/Reddish glow on screen
My phone 5S has a red glow. Not the entire screen though, just a perfectly shaped, perfectly centered box about the size of an iPhone 4 screen.
It's completely transparent and the screen works perfectly except that. It's like in Photoshop having a white background and a 10% red filled box in the middle. Very awkward.
It's pretty hard to see during normal use, but now I know it's there it definitely shows - definitely on apps with white background.
Sidenote: the phone is a 2nd hand one, so I wouldn't know whether it has an aftermarket screen. I also don't know for sure whether it had the problem before or not during the 1+ year I had it.
Is this a good question?