SimpleJew Many people that have tried to use the UN with T-Mobile, didn't work. Even though it showed service, they missed many inbound calls and had poor reception. I know many people that tried it and have also tried it myself on many devices. If anyone thinks it okay, maybe they just don't realize their missing anything...? Or its different in rural/urban areas (I am in Brooklyn NY)? Whatever the case may be, Since the device doesnt support VOLTE it would probably be unsopporterd when t-mobile sunsets the 2g service.