Vertical green lines just randomly appeared on my iPhone's screen
Vertical green lines just randomly appeared on my iPhone's screen. It was not after a drop or any other phone damage. One time, I just picked up my phone, and it had a green vertical line on one side of the screen. It didn't really bother me much, but a few weeks ago, another line appeared on the other side of the screen. What might have caused it? And what fixes does it require?
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iPhone X, iOS 15