I had a 1.1.2 jailbroken phone on AT&T that worked perfectly. I upgraded to 1.1.3 through iTunes and then used the Mac GUI version of Ziphone that was just released (see a few threads down) and my iPhone now fails on all calls. When I start the phone, it "Searches.." for service for about three seconds, then appears to show only one bar, without the AT&T sign. I've tried jailbreaking and activating multiple times, and have reset a bunch of times too. I've even tried restoring to 1.1.3, and I still get the same problem, which makes me think it has something to do with the baseband (?). I've tried SSH'ing into the phone and replacing lockdownd with a patched version, which seems to have done nothing... I have not yet tried the "Unlock", as I have been avoiding these (I want my warranty to stay intact). Please help!