After a series of successful tests, AT&T has signed a firm contract with AST SpaceMobile to provide space-based cellular service in all parts of the US where its terrestrial network does not reach. AST's solution involves launching huge new satellites that can connect directly to existing, off-the-shelf cell phones. T-Mobile is working with SpaceX on a similar system. (Most other services providing satellite connectivity for phones require special support in new phones.) AST conducted a series of tests in 2023 with its test satellite successfully proving voice calls, 4G data, and 5G data. The initial commercial network will consist of five new satellites in low-earth orbit, which will be delivered to SpaceX this summer for launch.


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