Hi Im new here so please help me. Ive jailbroken and unlocked five 3g iPhones and three 3gs iPhones but all on ios 4.1 on redsn0w. This is the first time ive tried ios 4.3.1 and on Sn0wbreeze. This 3gs was on an unlockable bb so i tried upgrading bb through sn0wbreeze but it never updated just stayed on 5.16 i think it was. So i done the normal 4.1 jailbreak with redsn0w and clicked upgrade bb and it upgraded fine. So i done the custom 4.3.1 ispw through sn0wbreeze and restored and it jailbroke fine. But when i set up cydia and installed ultrasn0w. But it didnt unlock so i tried all the resetting phone and turning 3gs on and rebooting and all those tips but still not working. Ive tried a few different sims too and nothing. all on vodafone uk. I am now panicing because i think it might be blocked? How would i tell? PLEASE HELP! ive looked all over the internet but cant find any answers!