I upgraded to 4.0 on an 8GB 3G. The upgrade went through fine but the phone does not run very well on iOS4 so I am trying to go back to 3.1.3 or 3.1.2. I plugged in the phone and iTunes saw it. I clicked restore and backed up the phone. It downloaded the latest 3.1.3 firmware and started the restore process. However, during the restore I get the error pop up that says the restore is not possible on the phone. Error 1015 or something I think it was. After this, iTunes says it sees a phone in recovery mode and will need to be recovered to be used. And then the loop continues. I tried to do an option click restore and use 3.1.2 and it does the same thing. Please someone help me out. I need to get my wife's phone working tonight before she leaves tomorrow with no phone!! Thanks Guys!