I have a 16GB iPhone 3G unlocked with blacksn0w. I've not had any trouble with it for over a month until today. I use T-Mobile and I plugged my iPhone into iTunes today. It gives me a message "The SIM card installed in this iPhone does not be appeared to be supported". I tried using a non-activated AT&T SIM card but it also does not work. I cannot sync my iPhone with iTunes. The iPhone is hackivated but for some reason iTunes doesn't think it's activated. Does anyone know a solution? Thank you very much.

Originally Posted by raycen

I have a 16GB iPhone 3G unlocked with blacksn0w. I've not had any trouble with it for over a month until today. I use T-Mobile and I plugged my iPhone into iTunes today. It gives me a message "The SIM card installed in this iPhone does not be appeared to be supported". I tried using a non-activated AT&T SIM card but it also does not work. I cannot sync my iPhone with iTunes. The iPhone is hackivated but for some reason iTunes doesn't think it's activated. Does anyone know a solution? Thank you very much.

Are you sure the phone is hacktivated? That message suggests not.
Restore and jailbreak again.. preferably this time with PwnageTool.