Currently Being ModeratedApr 2, 2013 8:49 AM (in response to Patrcik15)
Try DFU Mode Restore. Open iTunes on computer. Connect iPhone to computer with USB cable. Hold both Home and Power button, after exactly 10 seconds release the Power Button, keep holding the Home button until iTunes recognizes iPhone in Recovery Mode, usually about 20 seconds time. If the iPhone screen is black, blank this is DFU Mode. Click the Restore button of iTunes.
If any Error Messages are given write them down so you can look up the cause and solution. If you are still having problems, make Genius Reservation or set up service and take or send iPhone to Apple for resolution under Warranty.