Iphone keeps shutting off and rebooting. But, it gets stuck on the apple icon, and then goes black. Then it goes back to the apple icon. Once in a while, I can get it to turn on, but it always reboots again at some point. If I connect it to the computer, it turns on, and it IS recognized by itunes. However, the Iphone usually goes crazy and starts blinking on and off, and the "slide to power off" screen often pops up when plugged into the computer, also. But, it still charges. I have an Iphone 3g. It is jailbroken, and it is 3.1.2 software. Any suggestions on what to do? I am currently in China and need the phone to stay jailbroken in order for me to use it.