Washington: The satellite messaging service will be free to use until July -- even if you aren't a T-Mobile customer. According to Azeri-Press News Agency, we've all had dead-zone drama-moments when we're far enough afield that we're out of reach to the people we need or to the people who need us. Those days are, finally, numbered. 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. "If you see the sky, you can connect," said Mike Katz, T-Mobile's president of marketing, strategy, and products, in an interview. "And not just in emergencies." For years, smartphone makers and wireless carriers have sought to tap into constellations of orbiters to keep us more connected, and the expansion of T-Mobile's satellite tests is one of the biggest we've seen yet. But there's also som e fine print you should be aware of before you head for the backcountry. Here's what to know about T-Mobile and Starlink's plans.