I just recently (and stupidly) upgraded my phone to version 3.0. After realizing what I had done I have attempted to downgrade back to 2.2.1. I have tried restoring with downloaded versions of 2.2 and 2.2.1 by option clicking restore in itunes after putting my iphone in DFU mode. However no matter what i try i always receive error (21). additionally i cant get quickpwn to recognize my phone. Whats going on? Any suggestions? Have destroyed my phone for good? Please help. thank you for your help.