Hey, i have unlocked two 3G iphones with 2.1 Firmware using the Quickpwn.
Then when i put AT&T prepaid Sim, it works absolutely fine, whereas when i use T-Mobile Prepaid Sim, it gives me "No Service" error. Is there a solution for this?

With T-Mobile sim i can use everything else except making calls and sms. (Even Wifi works)


Turbo Sim is not the solution am looking for.