I'm having this problem with my iPhone 3GS 16GB, running on OS 4.1 the issue began like this: I was running low on battery (20%) and i plugged in to the wall for charge. Like 30-40 minutes later the phone suddenly rebooted itself. When it came back, on the carrier name, it said iphone. The battery icon was full charged. The wi-fi and bluetooth was grayed out, and there was no sound at all, no even when playing a song in the ipod. It remains like this for like 2 minutes, and continue rebooting itself. All of this happens with the phone connected to wall. When i unplug it, inmediately turns off, and doesn't power on unless i connect it again. I made everything at my knowledge to solve this, and nothing happened. Tried to power off and on, Tried to reset (holding power+home), i pulled out my sim, searched the entire web and nothing... Please let me know if you guys have an idea!