The deal turns SpaceX from a wholesale satellite partner into a credible direct rival to US wireless carriers, and early reports pointed to telecom shares falling on the news. AST SpaceMobile is the clearest loser, having openly pursued the same licences, and its shares are exposed to a reassessment of its spectrum position. Low-band coverage was the main technical weakness in a satellite-plus-ground offering, so its arrival raises the competitive threat to incumbents’ rural and indoor coverage advantage. FCC approval remains the key gate for the spectrum deal and timing risk for investors.---SpaceX has secured the low-band spectrum it needed to reach phones indoors, and won approval for a much larger direct-to-phone fleet, putting it on course to compete head-on with US carriers.Summary:SpaceX agreed to acquire Grain Management’s nationwide 800 MHz licence portfolio, up to 14 MHz of paired spectrum, subject to FCC approvalNo price has been confirmed; the portfolio was valued at around $6 billion when SpaceX and AST SpaceMobile were reported to be competing for it in AugustSpaceX says the low-band spectrum adds indoor coverage to its 2 GHz mid-band capacity and works with most existing phonesThe company plans to combine satellites and a ground network, calling Starlink Mobile the first operator to use both satellite and terrestrial spectrumThe FCC separately approved 15,000 Gen2 Starlink Mobile satellites, which SpaceX says offer more than 100 times current bandwidthBackhaul bands were also authorised for V3 broadband satellitesSpaceX has agreed to acquire a nationwide portfolio of 800 MHz spectrum licences from Grain Management, adding low-band airwaves that the company says will give its Starlink Mobile service coverage inside buildings and fill one of the last major technical gaps before it can operate as a full US mobile carrier. The deal, announced on Thursday by Grain in a statement and reported by Reuters, covers up to 14 MHz of paired spectrum and still requires approval from the Federal Communications Commission.The purchase ends a contest that became public in August, when SpaceX and rival AST SpaceMobile were reported to be pursuing the same Grain licences, then valued at around $6 billion. No price for the agreed transaction has been confirmed. Grain built much of the portfolio from 800 MHz holdings that T-Mobile sold after its merger with Sprint.The spectrum complements the 2 GHz mid-band capacity SpaceX gained through its earlier EchoStar deal. According to SpaceX, the mid-band layer carries high-bandwidth traffic while the 800 MHz layer travels farther and passes more easily through walls, reaching phones indoors. The company also says most handsets already in use support the band. Once regulators sign off, SpaceX plans to combine its satellite-to-phone constellation with a ground-based network, and it describes Starlink Mobile as the first operator to run both satellite and terrestrial spectrum on a single network.In a separate step this week, the FCC approved Starlink Mobile’s second-generation constellation, authorising SpaceX to launch 15,000 satellites designed for 2 GHz service worldwide. SpaceX claims the new satellites will deliver more than 100 times the bandwidth of the current fleet, with high-speed service directly to unmodified phones. The regulator also cleared a full range of backhaul bands for the company’s V3 broadband satellites, allowing them to connect with Starlink’s existing gateway network.Taken together, the two developments move SpaceX further from its role as a wholesale satellite partner to T-Mobile and toward direct competition with established US carriers. The pace of that shift will depend on the FCC review of the Grain transaction, the build-out of the terrestrial network and the launch schedule for the new constellation. This article was written by Eamonn Sheridan at investinglive.com.