Mine has rebooted twice- Both times under the same circumstances- I hooked the phone up to the wall-charger before going to bed, and didn't unhook it until several hours late in the morning. Both times, it rebooted. Every other time I've charged it, I never let it go more than 3 hours on the charger, and have had NO reboots. It might just be mine being quirky, but perhaps others are leaving theirs on charge too long? FYI.