So I was trying to upgrade from 2.2.1 to 3.0 and I used iTunes to upgrade to the 3.0 ispw as stated in the dev teams instructions for redsn0w. At first I couldn't proceed, but then I noticed I had iTunes 8, so I upgraded that to 9 and I could restore to the original 3.0 ispw. When I tried to start the device, it just shows me the cable + itunes picture and iTunes doesn't let me do anything since it's not the AT&T sim card. I can't restore to 2.2.1 either for some reason, and redsn0w stops working halfway through the procedure, every single time.
So I'm stuck here, I think I've tried just about everything, but I still can't upgrade or downgrade and I can't use the phone either.
I would be greatful for any help. Also, I'm banned from #iphone irc channel for some reason when I tried to ask there, is there a way to deal with that problem as well? Thanks in advance!