T-Mobile has spent years trying to get rid of the 800 MHz spectrum it previously used for 4G LTE coverage, but which is of no use in the days of 5G’s blazing speeds and a “spectrum layer cake” approach to building its network.
Grain Management bought the portfolio from T-Mobile in August 2026 for $2.9 billion, and SpaceX has now agreed to buy it for about $8 billion, with up to 14 megahertz of paired spectrum on the table, pending FCC approval. While the stock price of T-Mobile, Verizon, and AT&T fell on the news, as this piece of spectrum could potentially allow Starlink Mobile to offer in-house coverage, T-Mobile’s CTO isn’t having it.
The argument is that owning the airwaves and running an airline are two very different things. The 14 MHz portfolio is spectrum T-Mobile once operated as a single 5 MHz channel pair for LTE, but it sold it because it no longer fits its strategy since today’s 5G Standalone and 5G Advanced networks use much wider channels.
Even with it, Starlink Mobile would hold about 80 MHz, and some of that is uplink only, while T-Mobile says it sits on nearly 400 MHz of low- and mid-band spectrum. Additionally, a satellite hundreds of kilometers away experiences approximately 50 dB more path loss than a tower one kilometer away. Going from 2 GHz to 800 MHz only makes up a few dB of that gap.
The reason this spectrum is important is indoor coverage, as wall penetration is the Achilles’ heel of the signal transmitted from space directly to cell phones like the Galaxy S26 Ultra on sale at Amazon, even though SpaceX equips Starlink dishes with femtocell equipment. Saw points out that more than 70% of mobile traffic occurs indoors, at home, at work, in stores and in meeting places. Starlink’s existing and planned direct-to-cell (DTC) satellite constellation is great for outdoor use, but a consistent indoor experience is a much harder job. So the lower frequencies will probably help Starlink penetrate walls somewhat, but signal strength at the window and a usable connection in the living room are different things.
Even outdoors, T-Mobile calls satellite a complement to dense 5G networks, not a replacement, since a satellite beam covers an area served by hundreds of terrestrial sectors today, and it could get ugly when thousands of people stream video in the same city. Saw also mentioned that the US wireless industry has invested nearly half a trillion in infrastructure and spectrum auctions to build its 5G network, and it takes time, not just money.
While T-Mobile defends its turf here and says it welcomes the competition, SpaceX evidently intends to move quickly and the company has already shown it can surprise incumbents. With the launch of its massive DTC V3 satellites, Starlink Mobile will likely become a solid rural and backup option, but it remains to be seen whether it can be a real competitor in cities if it continues to acquire relevant spectrum.
Courted by technology since the industrial espionage of Apple computers and the days of pixelated Nintendos, Daniel opened a gaming club when personal computers and consoles were still an expensive rarity. Nowadays, the fascination isn’t with technical specs and speed, but rather with the lifestyle that the computers in our pockets, homes, and cars have instilled in us, from endless scrolling and privacy risks to authenticating every part and movement of our existence.
