I use PwnageTool 2.1 and iTunes 8.0.1 (11) to help jailbreak a friend's phone on my computer. She has a T-Mobile sim card. So I did the pwnagetool magic. You know the drill. And then I tried to restore the custom firmware that's generated. Error 1600. So I used the official restore to 2.1 (official version). Then enter DFU mode. Restore and Error 1600. (This method worked on my own phone though) Puzzled, I put the phone into recovery mode. Restore. Error 21. I am stuck now. Please help?