Although T-Satellite is a T-Mobile service, US users on rival carriers can access the satellite connectivity too for $10 per month. Here's how it works and how to sign up.

T-Mobile T-Satellite service is now out of beta testing and is available to all US smartphone users, including AT&T and Verizon customers.

For $10 a month, T-Satellite lets you stay connected within the 500,000 square miles of the US not under cellular coverage, and you don't need to be a T-Mobile subscriber.