Originally Posted by xyzzy
I think the claim that some phones don't operate properly with some carriers is garbage. If a roamer with a phone/sim from another country can use the network with then anybody can.
It's partly true. Many functions of current phones won't work well with some services the operator offers.
There are phones that don't work well with T-mobiles T-zones service, some phones don't do MMS correctly on ATT etc...
But I agree, to say that the phone won't work is of course BS, and ATT's way of telling you that they will never unlock for you...