Chosen Solution
I recently bought a secondhand iPhone 6. It currently does not have SIM card installed. I put an incorrect SIM card just to check the phone out and get past the white “hello” screen. I removed the SIM and within a day the screen would glitch out. Here’s what I mean by glitch: a complete mess of lines and/or squares of all colors, with no touch response. No amount of well placed pressure (around the corners or camera) effects it at all. I am currently in the process of restoring/updating through the recovery mode. I had to update my iTunes. The first time I tried to reset the phone, once the status bar filled up on the phone, it went straight into glitching again. The next time, it “took” and got me back to the “hello” screen, but iTunes told me I needed a SIM card to continue. Is it possible this could just be a SIM issue? Thanks for your help, I’ll update when I get the SIM installed.
@mtol the display issue should definitely not cause the screen issue. That sounds more like either a bad replacement or a bad install. potentially a loose connector. If it does happen again or happens frequently you could consider a new display assembly.
