My phone is 4 months old and I didn't jailbreak it. I was using it an hour ago and it had about 20% battery. I just picked it up to make a call and it won't turn on/go to lock screen/etc. I didn't drop it, get it wet. . .didn't do anything to it, just put it in my purse, came back in an hour, and nothing! Hopefully somebody out there can helfp!!! *I don't have applecare+, so, if it's totally dead what will apple/at&t do for me?? since it's only 4 months old!!!