Google Search: Your AT&T phone is a tri mode phone. It has a proprietary feature that

controls the systems that it can be used on. The phone has a built in

database that determines whos system it will roam to. You can not set the

Band on the phone with the Menu 4-4-2 . Try star3001Pound12345pound and

then arrow down to the nam 2 and use Nam 2 for you non at&t service.