My iPhone 5 started to reboot itself several times a day. It did this about 8 times in 3 days. Sometimes for no reason, a couple times when I was taking pictures. It just did it when it wanted to. I wasn't sure what was happening, so I took it into the Apple store and when the genius ran a diagnostic, nothing came up, no call info, no text info, it was if the phone was blank. He said that it was probably some electrical problem, so they replaced my phone for me. I had my new phone for 3 days, and the screen was became scratched like it was rubbed with steel wool. I went back to the Apple store to ask them about the ease of the scratches on this phone and they said that should not have happened. So even though it was a cosmetic thing, they replaced that phone with another new one. So thanks Apple for getting me a working phone thats not easily susceptible too scratches. I was not sure they would help me on the scratch issue, but they did.