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AST SpaceMobile is building a network of giant satellites to give ordinary smartphones a direct signal from space, so people can call and text anywhere without a cell tower.
AST SpaceMobile is trying to turn the sky into a cell tower. Its plan is to launch a constellation of unusually large satellites that talk directly to regular, unmodified smartphones — no special dish, no new chip, no app. You would just be holding your normal phone, and if you were out of range of any ground tower, the signal would come from a satellite overhead instead.
The problem it is solving is coverage. Phone companies build towers where enough people live to make the investment pay off, so huge stretches of land and sea have no signal at all. AST's satellites are designed to act like towers in orbit, beaming a normal mobile connection down from space and connecting back to a partner phone company's network on the ground. The phone company pays AST for the ability to keep its customers connected outside its own footprint, and the customer gets a signal where there was none. These satellites are not small. AST builds them at a factory in Texas, and each one is designed to unfold in orbit into a massive flat antenna array — roughly the size of a large building — because a big antenna is what lets an ordinary low-power phone reach all the way to space. That scale is both the company's edge and its headache: the satellites are complex and expensive to build and launch, and AST has burned through a lot of cash getting them into the sky. It went public in 2021 by merging with a blank-check company, and its shares have swung wildly as investors bet on whether the technology would actually work.
The bet is starting to show results. AST has launched several of its commercial satellites and signed deals with major mobile operators around the world, who see satellite coverage as a way to fill gaps and win customers without building towers themselves. The company also holds a large portfolio of patents and spectrum rights, which gives it some protection. But it is still an early-stage, money-losing business that depends on raising capital and hitting launch schedules, and its rivals — including SpaceX's Starlink, which is pursuing direct-to-phone service with its own partnerships — are formidable. In short, it is a high-risk, high-reward play on the idea that the next great phone network will be built in orbit rather than on the ground.
Saved answer · last researched 21 Oct 2026