SpaceX Buys 800 MHz Spectrum to Push Starlink Indoors
A nationwide low-band purchase from Grain Management could let Starlink Mobile reach phones inside buildings, and carrier shares fell sharply on the news.
By
Declan Moriarty
SpaceX has agreed to buy up to 14 MHz of nationwide 800 MHz spectrum from investment firm Grain Management, a purchase meant to give Starlink Mobile a terrestrial network that works inside buildings, Ars Technica reported on October 9, 2026.
In brief
- SpaceX describes the 800 MHz band as a coverage layer: its signal passes through obstacles such as walls and can reach customers’ devices inside buildings.
- T-Mobile obtained it in its 2020 Sprint purchase and had to sell it under a government merger condition.
- It also noted that SpaceX had already signed up international Starlink Mobile partners, among them SoftBank, NTT Docomo and Spark NZ.
Why low-band spectrum matters indoors
The deal complements the space-based Starlink cellular service. SpaceX describes the 800 MHz band as a coverage layer: its signal passes through obstacles such as walls and can reach customers’ devices inside buildings. It adds that most existing mobile devices already support this underused band.
In its FCC filing, SpaceX said the deployment will use radios feeding sectorized antennas on towers, rooftops and other structures. It points to the band’s long range, its resilience against terrain and clutter, and its building penetration. In August, Elon Musk argued that Starlink would roll out numerous small base stations instead of large cellular ones.
The licenses are nationwide but modest in size. The FCC’s July 2026 order said they cover approximately 100 percent of the US population, with between 4.85 and 14 MHz available depending on the county, usable for terrestrial service, satellite-to-mobile service, or both. The purchase adds to 65 MHz of mid-band licenses SpaceX is buying from EchoStar in a $17 billion deal the FCC approved in May 2026.
SpaceX said the spectrum “addresses one of the key remaining technical gaps that will pave the way for Starlink Mobile to become a major mobile carrier in the US.” That is the company’s own claim, not an established outcome.
How the licenses reached SpaceX
The spectrum has changed hands several times. T-Mobile obtained it in its 2020 Sprint purchase and had to sell it under a government merger condition.
| Step | What happened |
|---|---|
| 2020 | T-Mobile acquires the licenses through its Sprint purchase |
| Until 2024 | Dish holds first option under a Justice Department condition, then declines; the offer expires |
| Earlier in 2026 | T-Mobile sells the 800 MHz licenses to Grain for cash plus Grain’s 600 MHz licenses (10 MHz in 212 counties, about 15 percent of the population) |
| July 2026 | The FCC approves Grain’s purchase |
| October 2026 | SpaceX announces a deal to buy up to 14 MHz from Grain; terms undisclosed |
The irony is not lost on the market: SpaceX’s US mobile partner is T-Mobile, which leased it 10 MHz of nationwide mid-band spectrum, yet it is now buying former T-Mobile spectrum to compete with it.
The satellite timeline
- For its current mobile service, SpaceX has put 650 Direct-to-Device satellites in orbit.
- The FCC approved up to 15,000 next-generation satellites on Tuesday. SpaceX says the V2 satellites will deliver more than 100 times the bandwidth of the current generation.
- In a filing to the Canadian government, SpaceX said next-generation direct-to-device service would begin by late 2027, with thousands more satellites launched by the end of 2028.
Starlink’s earlier approach was to partner with carriers; the new spectrum points toward a standalone network. Earlier coverage of the sector is in our report on direct-to-device satellite connectivity.
Opposition, rivals and the market
Ars Technica says the FCC is likely to approve the deal but that small carriers may object. EchoStar’s spectrum sales to AT&T and SpaceX were opposed by the Rural Wireless Association, citing a “troubling pattern of spectrum aggregation that disadvantages rural wireless providers.”
The big three carriers are responding together. AT&T, T-Mobile and Verizon finalized a joint venture last week to pool spectrum for satellite coverage of dead zones, while keeping their existing carrier-satellite agreements and the freedom to pursue connectivity efforts independently. Separately, the FCC announced a plan this week that could put 25 MHz of mid-band spectrum up for auction, and the commission proposed rule changes to allow 482 MHz to be used for satellite-to-mobile service.
Investors reacted quickly. 247WallSt reported that in morning trading SpaceX stock stood at $166.89, up 4%, while Verizon fell 7% to $43 and AT&T fell 7% to $22.97. It also noted that SpaceX had already signed up international Starlink Mobile partners, among them SoftBank, NTT Docomo and Spark NZ.
Featured image. Source: Wikimedia Commons. Credit: Wikideas1. License: CC BY 4.0.
