My iPhone 5 abruptly crashed yesterday. I went to the Apple store to have it looked into. The "genius" took my phone in the back, returned 15 minutes later saying the phone had been opened by a non-Apple technician because its missing a screw and there are finger print markings on the inside of the phone, which voided my warrant and quickly hops on the macbook showing me repair shops that can fix the issue. I was flabbergasted!, because this was the first time the phone was being opened. He claimed maybe a cousin or someone opened my phone; what?!? Has this happened to anyone? How do you defend against something like this? You don't know what happened in the 15 minutes the phone was not in your possession, so it could be that those finger prints were an Apple technicians finger prints. Or they pulled a screw out and are using that as a way to not fix the issue. But it seemed like its their word against yours. Unfortunately I did not demand to see a manager, which I think I should have. I'm livid and not thinking correctly right now, but what would be the best way to handle this issue?