Disclosure: When you purchase through links on our site, we may earn an affiliate commission.
SpaceX has agreed to buy Grain Management’s entire nationwide 800 MHz spectrum portfolio, and with it, Starlink Mobile gets one of the biggest things it was missing: low-band airwaves that can reach inside your home and office.
Just a week ago, I argued that direct-to-device satellite coverage would not make terrestrial mobile networks obsolete anytime soon. SpaceX’s move backs that up. The company would not spend a reported $8 billion on ground-network spectrum if it believed satellites alone could do the job.
Low-band is the scarcest, most fought-over real estate in American mobile. AT&T, Verizon and T-Mobile have hoarded it for decades. Now a fourth player with deep pockets and its own satellite constellation is buying a slice of it.
Wall Street understood the message immediately. On Friday morning, T-Mobile shares fell nearly 10%, AT&T dropped more than 6% and Verizon slid more than 5%. Tower companies went the other way, with Crown Castle, American Tower and SBA Communications all posting strong gains.
What SpaceX is buying from Grain Management
Grain announced on October 8 that SpaceX will acquire 100% of its nationwide 800 MHz portfolio. That gives SpaceX up to 14 MHz of paired low-band spectrum across the United States. Neither company disclosed the price, but the Wall Street Journal reports SpaceX is paying about $8 billion in cash.
Deal detailWhat we knowBuyerSpaceX (for Starlink Mobile)SellerGrain ManagementSpectrumUp to 14 MHz paired, 800 MHz band, nationwideReported priceAbout $8 billion cash (WSJ)Implied valueAbout $1.73 per MHz-POP (New Street Research)StatusPending FCC approval and closing conditions
The history here is interesting. These licenses go back to the Nextel days and landed with T-Mobile after it bought Sprint in 2020. T-Mobile never put them to use. Dish was supposed to buy them as part of the Sprint merger remedies but never came up with the money. In August 2026, Grain took the portfolio off T-Mobile’s hands for $2.9 billion in cash plus Grain’s own 600 MHz licenses.
Two months later, Grain is flipping it to SpaceX at a price New Street Research’s David Barden says is well above the roughly $6 billion Grain was believed to be targeting. Nice work if you can get it.
Elon Musk did not undersell the moment. On X, he called it the “last critical piece of the spectrum puzzle” for complete phone coverage in America.
Why low-band spectrum matters for your phone
If you have ever lost signal the moment you stepped into a basement, an elevator or a big-box store, you already understand the problem low-band solves. Frequencies below 1 GHz travel farther and push through walls, roofs and windows far better than mid-band or high-band signals.
That has been Starlink Mobile’s weak spot. Satellite signals work brilliantly in open country, but they struggle indoors and in dense cities. SpaceX itself says this spectrum addresses one of its key remaining technical gaps on the road to becoming a major US mobile carrier.
The other big win is device support. SpaceX says most existing phones already support the 800 MHz band. If that holds, there is no need for a special handset or a satellite phone. If SpaceX lights this spectrum up, the phone already in your pocket should be able to use it.
How 800 MHz fits into SpaceX’s spectrum stack
This deal makes far more sense when you look at what SpaceX already owns. Earlier this year, the FCC approved SpaceX’s purchase of about 65 MHz of nationwide spectrum from EchoStar, a package reported at around $19.6 billion in total. Crucially, the FCC granted waivers that let SpaceX use that spectrum on the ground, in space, or in a hybrid of both.
BandAmountRole in Starlink Mobile800 MHz (Grain, pending)Up to 14 MHz pairedCoverage and in-building penetrationAWS-4 / 2 GHz (EchoStar)About 40 MHzCapacity, satellite direct-to-deviceAWS-3 (EchoStar)About 15 MHz unpairedCapacityH-Block (EchoStar)About 10 MHzCapacity
SpaceX is clear about the division of labor. The 2 GHz holdings deliver capacity. The 800 MHz layer delivers coverage. This week the FCC also cleared SpaceX’s next-generation direct-to-device constellation of 15,000 satellites, which the company says will offer more than 100 times the bandwidth of its current birds.
On the ground, SpaceX told the FCC it will use standards-based radios on towers, rooftops and other structures. Gwynne Shotwell has also talked about small, low-cost base stations with Starlink antennas built in. LightShed Partners analyst Walt Piecyk summed up the approach neatly, describing it as T-Mobile’s famous layer-cake strategy on steroids.
What this means for AT&T, Verizon and T-Mobile
The Big 3 have spent months telling anyone who would listen that they will not give SpaceX an MVNO deal. All three CEOs have said as much. Last week, they formalized a joint venture to pool spectrum resources for satellite service, a show of unity against Starlink.
This deal weakens that strategy. SpaceX no longer needs a carrier partner to get low-band coverage. It is buying its own.
There is also a spectrum auction angle. TD Cowen’s Gregory Williams points out that the carriers now face a well-funded new bidder at the table, with the FCC’s Auction 115 expected next April. Recon Analytics’ Roger Entner, who predicted back in August that Grain’s 800 MHz would end up with Starlink, also expects SpaceX to bid in the upper C-band auction for urban capacity.
LightShed’s analysts were blunt about the carriers’ joint venture. They see little real spectrum behind it, and warned it could invite antitrust scrutiny if it becomes a tool to lock SpaceX out. Their read on the MVNO standoff is the one I find most compelling: the first carrier to sign with SpaceX gets the wholesale revenue and a say in how it enters the market. The other two just get a new competitor.
The hurdles SpaceX still faces
Not everyone is buying the “complete coverage” line, and the skeptics make fair points.
- It is not a lot of low-band. Up to 14 MHz paired is meaningful, but New Street Research notes SpaceX will still significantly trail the Big 3, who have built up far larger low-band holdings over decades.
- The satellites cannot use it yet. The 800 MHz band is not compatible with SpaceX’s V1 or V2 direct-to-device satellites, which are built around the 2 GHz spectrum. This is a terrestrial play.
- Building a ground network is expensive. TD Cowen estimates a full terrestrial build would take years and cost upwards of $80 billion.
- The MVNO question has not gone away. MoffettNathanson’s Craig Moffett still believes SpaceX needs an MVNO agreement with one of the Big 3 to be truly competitive, and sees the spectrum spree partly as a way to force them to the table.
FCC approval looks like the easy part. SpaceX has asked for expedited review, and New Street expects a fairly smooth process given the current FCC’s enthusiasm for space-based connectivity. FCC Chair Brendan Carr has already welcomed the deal.
My take
I have watched plenty of would-be fourth carriers come and go in the US. Most failed because they had spectrum without a network, or a network without the right spectrum. SpaceX is the first challenger I have seen with a working global network already in orbit, a capacity layer in 2 GHz, and now a coverage layer in 800 MHz.
Is this the last piece of the puzzle, as Musk claims? No. SpaceX still has to build thousands of ground sites, win customers away from carriers people have used for years, and price aggressively enough to make switching worth it. The initial $8 billion spent on this deal is only the beginning of years of funding to build a credible terrestrial network. But it has moved from “interesting satellite add-on” to “credible threat” in a matter of months.
For US consumers, that is good news. More competition usually means better prices and better coverage.
Outside the US, I expect a different picture. Spectrum is licensed country by country, and buying low-band airwaves in every market SpaceX serves is neither practical nor, in many places, politically possible. So for most locations outside the US, I believe SpaceX will continue to partner with local carriers, as it already does with operators in markets like Canada, Australia, New Zealand and Japan. The US is the exception because it is SpaceX’s home market and the prize is big enough to justify going it alone.
What do you think? Would you switch to Starlink Mobile if it offered full indoor coverage? Let me know in the comments.
FAQ
What spectrum did SpaceX buy? SpaceX agreed to buy Grain Management’s nationwide 800 MHz portfolio, covering up to 14 MHz of paired low-band spectrum.
How much is SpaceX paying for the 800 MHz spectrum? The price was not disclosed. The Wall Street Journal reports about $8 billion in cash.
Will my current phone work with Starlink Mobile on 800 MHz? Most existing phones already support the 800 MHz band, according to SpaceX, so no special device should be needed.
Is SpaceX becoming a mobile carrier? That is the plan. SpaceX says the spectrum will help Starlink Mobile become a major US mobile carrier using a mix of satellites and ground networks.
When will the deal close? The deal needs FCC approval. SpaceX has requested expedited review, and no closing date has been announced.