I just upgraded my iPhone 4 to iOS 7 and everything went well until it tried to boot for the first time. It briefly shows the "Update Complete" page with the "slide to configure" at the bottom then immediately restarts and goes back to the Apple screen, vibrates, then eventually shows the "Update Complete" again, then restarts... I've tried turning the phone off and it allowed that once but then it immediately and automatically comes back on; starting the same loop again. I'd be content to restore iOS 6... but can't get out of this loop. Any suggestions would be appreciated.