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i haven’t dropped my phone for at least a couple months and my phone just started acting weird. white, grey and sometimes rainbow colored lines appear on my screen, sometimes so bad the display is unreadable. the touch screen will randomly stop responding sometimes for no reason, but will usually start working if i sleep the phone and then wake it back up. is this a screen problem that i should get it replaced, or something with the phone itself?
Sounds like the screen has gone bad, that is excluding if the phone has been liquid damaged then that happened. Here are link to parts and guide on how to replace the screen on iFixit: iPhone 5s Screen Replacement iPhone 5s Screen