Kind of an interesting question here. I've had my GS3 since summer and it's been running great. I was on a custom ROM with root (done without tripping binary), so it still says Samsung official and 0 flashes on the download screen, but it does say "custom" on the system status. Anyway, I hadn't done anything with flashing in several months. But the other day my phone just shut off and wouldn't turn back on. When I try, it vibrates, goes to the samsung splash screen, then shuts back down. Doesn't matter what I do, it won't get further than this. Can't boot into recovery or download mode with the button combos either. Won't read it on the computer or anything either. So I went out today and made a jig, thinking this would help. Well, it kind of did. It boots it into download for about five seconds, then shuts back off. So it's not enough time for me to get it to the computer and flash the stock ROM through Odin. I was thinking about trying to send it in to Samsung for warranty claim, because I had seen that people had luck with this when this was happening to a lot of GS3s in December. On several forums people said that Samsung was doing it no questions asked, regardless of root because they knew it was a hardware problem. So my question was just whether anyone here had any experience with it/Samsung? Or whether you guys thought I would be smarter to try and do it with AT&T? Anyway, thanks a lot for your time and input.