T-Mobile MVNO Roaming for FREE: Sign up here!
Roaming is included with us on AT&T and other partners. I’ve used at least 2 myself: Cellular One and AT&T.
We are the ONLY T-Mobile MVNO to include roaming for free.
Better yet, you can try it for 14 days and get a refund if you don’t like it. Never a contract, and only $49 plus tax per month.