SpaceX has acquired up to 14MHz of paired spectrum in the 800MHz band across the US, giving its Starlink Mobile project a key building block for nationwide phone service. The spectrum came from Grain Management, and Elon Musk described it as the final major piece needed for SpaceX to provide complete mobile coverage in America.

The planned network would combine Starlink satellites with ground-based infrastructure. SpaceX intends to use satellite connections primarily for outdoor coverage, including in rural and underserved areas, while the newly acquired low-band spectrum would help extend service indoors.

How Starlink Mobile would use the 800MHz band

The 800MHz band is already supported by most smartphones, according to the information provided about the acquisition. That could allow Starlink Mobile to serve compatible devices without requiring a specialized handset for this part of its network.

SpaceX also plans to use its existing global 2GHz mid-band spectrum in the US. The company says that spectrum will support faster, higher-capacity coverage, mainly outdoors. Together, the satellite and terrestrial components are intended to create a network that can connect devices across different environments.

SpaceX says its approach will combine a satellite-to-mobile constellation in orbit with an advanced terrestrial deployment. The company will need regulatory approval before it can complete the latest spectrum transaction and put the planned architecture into operation.

SpaceX targets AT&T, Verizon and T-Mobile

If approved and deployed as planned, Starlink Mobile would compete directly with the three major US wireless carriers: AT&T, Verizon and T-Mobile. SpaceX claims its service would provide better outdoor coverage than those networks, particularly in rural and traditionally underserved locations.

The company’s proposed service would therefore extend beyond satellite messaging or limited emergency connectivity. By adding terrestrial spectrum and ground-based equipment, SpaceX is pursuing a full mobile network that could offer coverage in places where satellite links alone may not provide a complete solution.

Satellite and terrestrial network expansion

SpaceX has received approval from the Federal Communications Commission to deploy 15,000 next-generation satellites for the service. Those satellites would form the space-based portion of the network, while the 800MHz licenses would provide an additional layer for reaching phones on the ground.

The spectrum’s ownership history links the deal to a recent transaction involving T-Mobile. In August, T-Mobile sold the licenses to Grain Management in exchange for Grain’s 600MHz spectrum licenses and $2.9 billion in cash. SpaceX’s acquisition now places those 800MHz assets at the center of its broader Starlink Mobile strategy.

The next milestone is regulatory approval for SpaceX’s purchase. Until that process is complete, the company’s plan remains a proposed combination of satellite coverage, low-band spectrum and terrestrial 5G infrastructure.