SpaceX Buys Grain's Nationwide 800 MHz Airwaves, Reportedly for $8 Billion, So Starlink Can Reach Phones Indoors

SpaceX already sells you internet from orbit. Now it wants the kind of airwaves that get a signal through your kitchen wall. Grain Management, an investment firm specializing in digital infrastructure, agreed to sell SpaceX its whole nationwide 800 MHz holding, and the transaction is “subject to FCC approval and other customary closing conditions,” according to the deal notice from Grain’s lawyers at Latham & Watkins.

Elon Musk didn’t undersell it. “This is the last critical piece of the spectrum puzzle needed for SpaceX to provide complete phone coverage in America,” he posted on X, adding “Very big deal,” as quoted by Ted Hearn at Broadband Breakfast. SpaceX’s own post said the agreement “will pave the way for Starlink to become a major mobile carrier in the U.S.”

David Grain, the firm’s founder, framed the sale bigger still. “Spectrum is a finite resource with an expanding role in the economy,” he said in remarks carried by Telco Magazine, adding that the agreement has “the potential to change where and how Americans connect.” Grain only took over these licenses from T-Mobile in August.

The plan, per Telco Magazine, is a hybrid: SpaceX’s 2 GHz spectrum carries capacity, and the 800 MHz band handles coverage and getting inside buildings. Low frequencies travel farther and soak through walls better than high ones, which is exactly what a satellite signal aimed at a phone in a basement lacks.

There’s a catch, and it’s hardware. Jake Neenan at Broadband Breakfast reports these airwaves aren’t compatible with SpaceX’s current or planned direct-to-device satellites, so using them means new satellite antennas or radios on the ground. In its FCC public interest statement, SpaceX said it “would deploy gear on towers, among other things.”

Analysts weren’t all sold. “The 14 megahertz SpaceX is acquiring is still a fraction of the low-band resources of the carriers,” New Street Research wrote, adding, “We aren’t sure we buy into it.” Wall Street took it seriously anyway: AT&T and Verizon shares fell about 7% and T-Mobile more than 9%, Broadband Breakfast reported, while tower companies rose by similar amounts.

Satellite analyst Tim Farrar pointed at the calendar. “Note the timing of this deal, roughly four weeks ahead of Grain’s deadline to tell the FCC who it chose,” he wrote. What nobody has put a date on is the moment an ordinary phone first connects to Starlink on these airwaves, and whose towers it’ll be talking to when it does.

Expect the next fight to be about towers and wholesale deals rather than satellites. BNP Paribas analyst Sam McHugh told Broadband Breakfast that building a ground network without a wholesale deal would be “the very long road,” and suggested the purchase could push carriers toward one. The likely read is that the spectrum is as much leverage as it is coverage: a bargaining chip that makes an incumbent’s network look cheaper to lease than to compete with.

What SpaceX didn’t say: a price, a launch window, which phones will work, or how the 800 MHz band reaches orbit when today’s satellites can’t use it. The FCC’s review is where the first of those answers is likely to show up.