Hey guys, My first post here, I've read/learned a lot from this forum and now it's time I make an account. I didn't know where else to turn. I bought and iPhone 4S from Craigslist, long story short I went to apple and explained that while it charges it just restarts randomly and while it is on it also restarts randomly sometimes. It is in fact an iPhone 4S and it has applecare and everything. The Genius took the phone in the back after i told them what the problems and were and he came out with the back unscrewed and showing me how parts were missing (heat sensors, batter casing, etc.). I begged him not to void my warranty and I am pretty sure he didn't. My question is, does apple always open the back and look at the phone? Because if they do I have no chance of getting it replaced. Or do they sometimes open the back and sometimes not, because if that is the case I could get it replaced. Thanks guys sorry for the mischievous first post, I just didn't know where else to turn.