I have a iPhone 4 and am trying to restore with 4.1 GM firmware, I tether at home so I can't ask for this at home, im at school now but heres the deal. I do have a UDID regestered under my name, so GM will work. I tryed in restore mode first, and it hangs on iTunes at the very end, on my iPhone about 5/8 of the way through the loading bar. I did DFU mode, I get a 1604, brand new cable, rebooted my mac, firmware streight from apple not currupt ******* or something like that, but it will not restore! I was jailbroken, and was going to a unmodified firmware so... any ideas?