SpaceX is moving closer to becoming a full mobile network provider after acquiring up to 14MHz of paired spectrum in the 800MHz band across the United States. The spectrum, purchased from Grain Management, could help the company expand Starlink’s mobile coverage beyond satellite connectivity.
Elon Musk described the acquisition as the “last critical piece of the spectrum puzzle” needed for SpaceX to provide complete phone coverage across America. The move supports the company’s broader plan to combine satellite technology with ground-based mobile infrastructure.
How SpaceX Plans to Expand Starlink Mobile Coverage
SpaceX intends to use Starlink satellites to deliver mobile connectivity outdoors, while the newly acquired 800MHz spectrum could help extend coverage inside buildings. This combination could address one of the challenges facing satellite-based mobile services: maintaining reliable connectivity in different environments.
The 800MHz band operates at a relatively low frequency, which generally penetrates buildings better than higher-frequency spectrum. As a result, it could improve indoor coverage where satellite signals may face limitations.
Another advantage is device compatibility. Most existing smartphones already support the 800MHz band, potentially allowing SpaceX to provide terrestrial connectivity without requiring specialised devices for that part of its network.
Meanwhile, Starlink Mobile will also use SpaceX’s existing 2GHz mid-band spectrum. This additional spectrum is intended to support higher speeds and greater network capacity, particularly outdoors.
Starlink Plans to Combine Satellites With Ground-Based 5G
SpaceX aims to integrate its satellite network with terrestrial infrastructure to create a more comprehensive mobile service. The company plans to deploy ground-based femtocells alongside its satellites to provide 5G coverage.
Femtocells are small, low-power cellular base stations that help extend mobile coverage in specific locations. Combined with satellite connectivity, they could help Starlink Mobile serve users across different environments.
However, the spectrum acquisition still requires regulatory approval. Following approval, SpaceX says it will deploy a flexible network architecture that combines its satellite-to-mobile constellation with terrestrial coverage.
The system aims to let compatible devices switch between satellite and ground-based connections seamlessly. Consequently, users would not need to manage the transition themselves when moving between the two types of coverage.
Could Starlink Mobile Challenge Major US Carriers?
If SpaceX deploys the network at its intended scale, Starlink Mobile could emerge as a direct competitor to established US carriers, including AT&T, Verizon and T-Mobile.
Its potential advantage lies in reaching rural and underserved communities. Traditional mobile networks depend heavily on cell towers, which can be expensive to build and maintain in remote areas. By contrast, satellite connectivity can reach locations where conventional infrastructure remains limited.
SpaceX has already received approval from the Federal Communications Commission (FCC) to deploy up to 15,000 next-generation satellites for the service. This approval provides an important foundation for its broader satellite-to-mobile ambitions.
Nevertheless, the network’s ultimate reach and performance will depend on deployment, regulatory requirements and how effectively satellite and terrestrial systems work together.
How SpaceX Acquired the 800MHz Spectrum
The 800MHz spectrum involved in the deal originally belonged to T-Mobile. In August, T-Mobile sold the licences to Grain Management in exchange for Grain’s 600MHz spectrum licences and $2.9 billion in cash.
SpaceX is now acquiring the 800MHz spectrum from Grain Management as part of its wider mobile network strategy. The transaction gives the company another resource to support its planned combination of satellite and ground-based connectivity.
The acquisition could therefore represent a significant step in Starlink’s evolution. Rather than focusing solely on satellite internet, SpaceX is working towards a mobile network that integrates satellite coverage, terrestrial infrastructure and additional spectrum.
If the company successfully develops this system, Starlink Mobile could expand its role in the US telecommunications market while seeking to improve connectivity in areas underserved by conventional networks.
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