T-Mobile Starlink is obviously available to T-Mobile customers, but the carrier said that Verizon and AT&T customers can also use it on their existing phones without switching entirely to T-Mobile. Verizon and AT&T customers will need an unlocked phone with eSIM technology, which lets users activate a cellular plan without a physical SIM card.

Providing connectivity in areas where it’s never been available before will be incredibly useful for a lot of people.

In a splashy ad that aired during the Super Bowl’s first quarter on Sunday, T-Mobile said it was throwing open the doors to its satellite messaging beta test — powered by Elon Musk’s Starlink — for free until July. The twist? You don’t even need to be an existing T-Mobile customer to try it.

During the Super Bowl on Sunday, T-Mobile announced the public beta launch of its direct-to-cell program with Starlink. Customers can sign up, free of charge, until it moves out of beta in July. And you don't have to be a T-Mobile subscriber to try it out.

T-Mobile starts trial of Starlink service for its customers and others with full roll-out from July for $15 per month.

Want to try the new Starlink satellite connection on your phone? Sign up to the T-Mobile beta and you can, for free, until July—even if you’re with another carrier.

Newsweek contacted T-Mobile for more information on the beta rollout via email. The agreement between Starlink, a subsidiary of Elon Musk's SpaceX, and T-Mobile may signify the effectiveness of the satellite technology.