Chosen Solution
Hi!
So my iPhone randomly starts to flicker and becomes unresponsive for a while, Whenever it decides to work again I can use it up to a day before before it reverts back to flickering and the screen unresponsive. I’ve tried turning the screen brightness down and rebooting the phone which people have suggested. What else might fix the problem? Many thanks!
Sounds like a faulty screen, did you get the screen replaced by someone before? If yes I would take it back to them for warranty under the screen.