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.

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.

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.