i tried to use quickpwn for windows. i backed up my back up. i restored to official 2.1 (my phone is 3g 16gb) when it finished it said it was successful. i rebooted my pc. i opened up itunes and it recognizes the iphone but it does not recognize the sim. it does not show the bars or the carrier. what may be happening??? is it the firmware i downloaded maybe? what am i doing wrong. can i fix this? i am restoring right now to the official firmware again. i hope i didnt do anything irreversible. help guys please.