I jailbroke my iPhone 3GS w/4.2.1 using greenpois0n RC6 (Final) and then used the redsn0w 0.9.6 Beta 5 to Install the iPad Baseband and had success with that as my Modem Firmware reads 06.15.00. After I installed Ultrasn0w 1.2 via Cydia, it keeps saying “No Service/Searching” when I put in my T-Mobile SIM Card in, however, when I put my AT&T SIM Card in, it’s able to connect to the AT&T network. I noticed a few threads but they were respective to iOS 4.1, I’m currently on iOS 4.2.1, so I don’t think that would apply to me, would it?
pls help me for unlocking my i phone 4g its coming from from uk myi phone not acept any sim how can i use any sim in my phone pls help me for this problem