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Both AST SpaceMobile and Starlink aim to connect ordinary mobile phones from low Earth orbit through mobile-operator partnerships. Their approaches are not interchangeable: Starlink describes a roaming-like extension of carrier LTE networks, while AST is building a wholesale satellite network around large BlueBird phased arrays and a broader voice, data, and video ambition. The clearest difference today is rollout evidence: SpaceX reported commercial messaging availability in two markets in February 2025, while AST’s June 2026 filing said its service had not launched as of that filing.
How does Starlink Direct to Cell work?
SpaceX describes Direct to Cell satellites as cell towers in space. A participating mobile network operator (MNO) supplies LTE spectrum, and the satellite network integrates with the operator in a way SpaceX compares to standard roaming. The intended result is connectivity for a regular LTE phone without a user-installed dish or a dedicated satellite handset.
That link is technically demanding: a satellite moves quickly relative to a phone, while phones have low transmit power and small antennas. SpaceX says its system addresses challenges including Doppler shift and latency with phased-array antennas, custom silicon, and software that adjusts beam size and placement. These are SpaceX’s descriptions of its design, not an independent assessment of service quality.
How is AST SpaceMobile different from Starlink?
| Comparison | Starlink Direct to Cell | AST SpaceMobile |
|---|---|---|
| Satellite approach | Specially designed satellites described by SpaceX as cell towers in space, using phased arrays, custom silicon, and software to connect with phones. | BlueBird satellites built around large phased arrays and beamforming, designed to connect directly to unmodified, off-the-shelf devices. |
| Operator and spectrum model | Partner operators provide LTE spectrum; SpaceX describes integration as similar to roaming. | AST combines spectrum licensed by operator partners with its own holdings and plans to distribute service through wholesale operator agreements. |
| Service ambition in cited company materials | SpaceX described messaging as commercially available in its February 2025 note and planned to add IoT, data, and voice later. | AST describes a planned cellular-broadband service intended to support voice, data, and video. |
| Rollout evidence | SpaceX reported commercial messaging availability with T-Mobile in the United States and One NZ in New Zealand in February 2025. | AST’s June 2026 SEC filing said the service had not launched as of that filing; its official FAQ describes initial beta access as a target. |
Satellite and antenna design
AST’s June 2026 SEC filing describes Block 2 BlueBird satellites with phased arrays of up to approximately 2,400 square feet, designed for up to ten times the bandwidth capacity of Block 1. Those are design and capacity claims, not proof of a particular customer experience. SpaceX’s February 2025 note identifies phased arrays as part of its approach but does not provide a directly comparable array-area figure.
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What AST’s performance figures mean
AST’s 2026 SEC filing reports a prior demonstration peak of 98.9 Mbps directly to a standard, unmodified smartphone. A demonstration peak is not a typical rate or a commercial-service guarantee. AST’s official network page, accessed October 4, 2026, advertises peak speeds over 150 Mbps per coverage cell for next-generation satellites; that is also an AST-stated capability, not independently verified delivered performance.
These figures cannot establish which network will be faster for a subscriber. The cited sources do not provide an independent, comparable field test of the two systems under the same conditions.
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Which mobile operators and spectrum are involved?
The operator relationship is central to both models, but the arrangements differ. SpaceX says its partners provide LTE spectrum in the 1.6–2.7 GHz range and that the satellite connection is integrated with their networks. That frequency range is SpaceX’s description of the partner spectrum used for Direct to Cell, not a promise that every carrier or market uses the same bands.
AST describes wholesale agreements with MNOs and a service that combines partner-licensed spectrum with AST spectrum holdings. Its 2026 SEC filing names arrangements involving AT&T, Vodafone, Verizon, and Saudi Telecom Company, and reports partnerships with more than 60 MNOs. The filing also cites partner footprints reaching over 3 billion subscribers. Those figures describe potential partner reach—not AST customers, active satellite coverage, or the number of people who can currently use the service.
AST’s filing describes intended service for AT&T users in the continental United States, excluding Alaska and Hawaii, with Verizon service “when needed” in those geographies. It also describes a ten-year Saudi Telecom Company agreement for Saudi Arabia and key regional markets, and a Vodafone/SatCo distribution arrangement. These are contract and intended-market descriptions, not a current retail plan list or proof that service is live in those places.
What is available now, and what remains a target?
Starlink: a dated snapshot, not a current coverage map
SpaceX’s February 2025 note reported commercial messaging availability for T-Mobile customers in the United States and One NZ customers in New Zealand at that time. The note also described plans to expand to other countries and later add IoT, data, and voice. This is a historical company-reported status; it does not establish the complete availability or feature set on October 4, 2026. Check the relevant carrier’s current information before relying on access in a particular location.
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The same February 2025 note said Starlink’s constellation had more than 400 satellites at that time. That is a dated constellation snapshot, not a current satellite count or a measure of coverage available to any one phone.
AST: launches do not by themselves mean service is live
AST’s June 2026 SEC filing said the SpaceMobile Service had not launched as of the filing and described beta testing and limited, noncontinuous coverage as planned stages before rollout. AST’s official FAQ says initial U.S. beta users are targeted through AT&T and Verizon, with noncontinuous nationwide coverage as the starting approach. A stated target is not evidence that enrollment is open or that a reader can currently connect.
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AST’s 2026 SEC filing records 13 BlueBird spacecraft launched by August 5, 2026: BB6 in December 2025, BB8–BB10 in June 2026, and BB11–BB13 on August 5, 2026, in addition to earlier spacecraft. It also records that BB7 reached an orbit too low to sustain operations and was de-orbited. Satellite launches are a milestone in building the network, but do not establish continuous coverage or a launched consumer service.
The filing set an expectation of approximately 45 satellites in early 2027. That is a forward-looking target, subject to manufacturing, launch readiness, regulatory approvals, and other uncertainties; it is not a guaranteed date or a present coverage claim.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What would a subscriber need?
For the direct-to-phone models described by both companies, the intended device is an ordinary mobile phone, not a dedicated satellite handset or a user-owned Starlink dish. Access is carrier-linked, so a compatible phone alone does not establish eligibility: the relevant operator, plan, location, and service availability matter. The cited sources do not establish a current carrier-by-carrier plan and price list, so check the operator for current requirements rather than assuming that an announced partnership means a service is available to every customer.
What the comparison does—and does not—show
The strategic distinction is between an operator-integrated satellite extension already reported for messaging in limited markets by Starlink in 2025, and AST’s planned wholesale broadband network built around large BlueBird arrays. AST’s stated capacity goals and demonstration results indicate what the company is pursuing, not a verified commercial advantage over Starlink. Since the available evidence contains no independent head-to-head service test and does not provide a current, complete Starlink country-and-feature matrix, the sound comparison is about architecture, operator model, stated ambitions, and dated rollout evidence—not a claim that one network is universally better.
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For a household budgeting decision, neither partnership announcements nor satellite-count targets are enough to justify changing carriers or buying special hardware. Confirm current availability and any plan conditions with the mobile operator serving your area.
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