Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_3 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8F190 Safari/6533.18.5) Ok so i have a 3GS on 4.3 firmware with iPad baseband and it WAS unlocked on t-mobile but as soon as i updated ultrasn0w to 1.2.1 it screwed it up!!!! I have tried reinstalling, re-jailbreaking, custom firmware, official firmware, rebooting my phone, restarting springboard, taking out the sim then reinstalling and putting the sim back in, and nothing works!!!! I HAVE EVEN TRIED LEAVING MY PHONE OFF FOR AN ENTIRE DAY!!!!!!!!!!!!!!!! All i get is one little bar with no carrier and after a while it goes to no service! I heard this was the problem on 4.3.1 and i would update but i cant because im on custom firmware and cant go to official and everytime i try to update to another custom firmware it gives me a whole bunch of 1015 and 37 and etc errors! If anybody knows the solution to this please help.