i tried to update my 3g. and the only option was to restore so idid it. then after it says extracting software it went on to preparing iphone to restore and then after a minute or so. it said the iphone could not be restored due to an unknown error (21) i kept doing the process for like 5 times now and it was the same. i restarted my macbook. and it was still the same. now my iphne only says connect to itunes. plsssssssss guys help me out if you can. i think my phone is bricked. i desperately need your help guys.