OK my friend gave me his iphone 3gs to help him. When I turn the phone on it gets past the apple logo and gets to the lock screen. It will seem ok on the lock screen but when you slide it or let it sit for a few sec it freezes. I have retored the thing a few times with stock 4.3.5 fw same thing. One time it booted up ok and let me use it for a few hours. Then it freezes and same thing. I did a recovery and in dfu mode same deal. not sure what else to do.