My friend gave me their old iPhone 3G to see if I could fix any of its numerous problems. The phone: Has two cracks in the back. 's SIM tray will not properly eject. 's power button is jammed in, though it still works. 's vibrate switch snapped off. When I got it, it was on 3.1.3. I upgraded it to 4.1 and jailbroke with Redsn0w. I tried installing iDroid to test it out, but it told me I didn't use one of the required JB tools. I tried restoring again, and now it is stuck in recovery mode. When I try restoring it iTunes gives me the 1603 error. Is there anything I can use to get out of this? Thanks.