I restore to 1.1.1 without virginize an unlocked 1.0.2 and I got Incorrect SIM message for the original AT&T sim.
I know I supose to virginize before the restore, but I didn't...
I downgrade to 1.0.2 again and got the same incorrect sim message.
Please, someone help.
I did it using this:
Jailbreaked and virginized. :)