I have got an excellent iPhone. I had already jailbreak using jailbreak forums trick with no problems and I have done ultra snow for unlocking the iPhone. It is an UK 02 phone version 4.0.1 firmware 5.13.4 and I would really like to use a 3 Uk sim in it but I got a error message no service. It has also got an updated carrier setting which show as 7.2. I had also checked the other sim but they are working very fine. What I am missing here? Can anyone tell me the whole procedure of it.