Owners of the iPhone 3G and fans of network freedom have been waiting for this day for a long time. The masterminds behind iPhone ‘pwnage’ have finally released an unlocking solution for the iPhone 3G.
The iPhone 3G unlock doesn't COMPLETELY work with T-Mobile USA. I inserted my uncle's T-Mobile SIM card into my iPhone and mostly everything worked except outgoing calls. I can receive calls but when I try to call somebody, the service bars disappear and my iPhone says that the call has failed. I don't think it's going to take long for the development team to come out with a fix.
Ive been using ATT for 5 years or so and never had a problem with them as long as I paid my bill on time. In my area their service is great and the 3G speeds are nice. My iPhone is jailbroken for 3rd party apps, but I have no reason to unlock mine.