Yes in theory. But you can't roam the entire time or everywhere another provider has signal; in fact I've never managed to use it because I've only tried it in locations where my provider has awful coverage, and my phone's been unable to register. It's clearly only tailored to allowing you to get some semblance of service when you go out of the official range on occasion. It has various limits and T-Mobile terminates your contract if you roam more than half the time. So it's not like you can live somewhere out of their range and just change whom you pay your bills to and switch to roaming most of the time.