Summary

  • A visible satellite footprint is a technical possibility, not proof that a mobile operator holds an enforceable wholesale service for every subscriber, device and service class inside it.
  • The FCC’s Supplemental Coverage from Space framework makes spectrum authority and the terrestrial licensee–satellite operator lease part of the delivery chain, while filing completeness still does not prove an integrated live service.
  • A useful wholesale contract should settle an accepted service state by zone, subscriber eligibility and service class, with evidence for network handoffs, capacity, exceptions and remedies.

The easiest way to misunderstand direct-to-device satellite coverage is to begin with the map. A broad coloured area suggests that a standard phone can remain connected after the terrestrial network disappears. For the retail customer, that is an intuitive promise. For the mobile operator buying the service, however, the relevant object is not the colour on the map. It is a completed subscriber session that crossed every authorised and operational handoff and can be reconciled against the wholesale bill.

Imagine a customer standing outside terrestrial coverage and attempting to send a message. The satellite is above the horizon, the handset is nominally compatible and the operator advertises supplemental coverage. The session can still fail because the relevant spectrum lease is not effective for that geography, a beam or gateway is unavailable, the subscriber or plan is not eligible, the device supports a different service class, authentication does not reach the operator core, capacity is not admitted, or the requested service is outside the current commercial scope. None of those states is visible in a footprint graphic.

Authority comes before coverage

The US Federal Communications Commission’s 2024 SCS Report and Order established a framework for satellite operators and terrestrial providers to use spectrum previously assigned to terrestrial mobile service. It describes SCS as supplemental connectivity for a terrestrial licensee’s subscribers, particularly where terrestrial coverage is absent. The same order makes a formal spectrum-manager or de-facto-transfer lease part of the authorisation path; a commercial operating agreement alone is not a substitute.

That distinction matters commercially. The terrestrial operator brings licensed spectrum and the subscriber relationship. The satellite operator brings space and ground infrastructure. Regulators retain authority over the lease, satellite operations, earth stations, interference and public-safety obligations. A contract that says only “coverage available within the footprint” compresses those separate control surfaces into one marketing statement.

The FCC’s December 2024 filing guidance makes the chain more concrete. An SCS filing using Form 608 identifies the spectrum lease and its attachments. The satellite operator’s Form 312 material must link relevant applications and leases and describe the coverage areas to be served. Earth stations must satisfy equipment-authorisation requirements before operations begin. Those filings prove that the parties have addressed specified regulatory prerequisites. They do not prove that a particular subscriber, at a particular moment, received a message, voice call or data session.

The commercial model does not define the accepted unit

AST SpaceMobile’s issuer-filed 2025 Form 10-K illustrates why the wholesale unit needs to be explicit. The company says mobile network operators will market the service to their own customers and that it generally seeks revenue-sharing arrangements with those operators. It also says access to terrestrial mobile frequencies depends on cooperative arrangements such as spectrum leases and on regulatory approval or notification.

The filing describes several definitive MNO agreements, but their geographies and distribution structures are not identical. It also describes multiple performance obligations, including equipment or software and a stand-ready obligation to provide SpaceMobile Service. Service revenue is to begin when an MNO receives access to the satellite network. As of the end of 2025, the company said it had not recognised SpaceMobile Service revenue. It reported about $1.2 billion of remaining performance obligations while treating variable revenue-sharing consideration as constrained because end-customer usage remained uncertain.

These are issuer statements, not evidence of realised service quality. They show that access, readiness and usage are separate commercial states. They do not reveal minimum throughput, reserved capacity, availability percentages, service credits, revenue-share percentages or subscriber success rates for any named agreement. A buyer should not fill those blanks with a footprint estimate.

What the operator should actually buy

The contractual unit should be a zone-by-service-state entitlement. Each accepted record should join six things.

First, authority: the lease, satellite authorisation, earth-station authority and contracted geography are valid. Second, eligibility: the subscriber, device, tariff, roaming state and requested service class qualify. Third, integration: authentication, gateway, operator core, routing, emergency handling and settlement interfaces are operational. Fourth, delivery: the parties agree where and when availability, admission, latency, throughput or message completion are observed. Fifth, exception: interference protection, regulatory suspension, capacity contention, device limits and force majeure have named owners and evidence.

Sixth, settlement: the wholesale charge or revenue share attaches to an accepted state, with a dispute path and remedy when the contracted unit is absent.

This does not require a guarantee that every outdoor location will work at every instant. Satellite geometry, radio conditions and shared capacity make such a promise implausible. It requires precision about what has been purchased. A footprint can remain an explanatory layer. It cannot be the acceptance test.