Iphone keeps on restarting

[trey41]

please help iphone keeps on restarting.but when i plug it into the usb it start's up and works fine unto is goes to sleep mode. please help

 

[Cjtr]

That same thing happend to me, you just need to put it in recovery mode and restore with itunes.
To put it in recovery mode:
1- Turn it off
2- hold the home button and plug it into youre computer.
3- Launch itunes
4- Keep holding down the home button until itunes says it found an iphone in recovery mode
5- Restore