When I first upgraded to pwnd 2.0 I had no service. I then creted a pwnd 1.1.4 image and restored to that. When it rebooted, it flashed the bootloader and baseband and rebooted. I then opened up the pwnage tool on the iPhone and let it "unlock" my bb. It reflashed the bb, after which I re-upgraded to 2.0 and all worked fine. Good luck!