I have an unlocked Motorola A1200. I am with T-mobile and nothing is wrong with the phone or sim card. The phone will do everything except make and receive calls. It reads the sim but says register then switches to emergencies calls only on the bottom of screen. I called T-mobile and Motorola and they both can't do anything. In the call setup there is no current network. Which is my problem. How do I get it on their network? What is the network Id? I go to the different known networks that are labeled T-mobile and hit connect or register whatever it says and it just sits on that forever doing nothing. Please help