I have gotten myself into a pickle here. I just unintsalled blacksn0w so I could tether without the unlock and now I have no signal. I have restored my phone with the custom 3.1.2 ipsw created from the pwnage tool and that still doesn't pull in the AT&T signal. I have searched high and low to no avail. What do I need to do to properly remove the unlock or restore my signal. Resetting the network settings won't work. I put my SIM in another iPhone and it works fine. I am a little lost here.