AST SpaceMobile is building a satellite network designed to deliver broadband directly to standard, unmodified smartphones — no specialized hardware required. The core technical premise is that its large-format Block 2 "BlueBird" satellites, featuring a phased array antenna of roughly 2,400 square feet (the largest commercially deployed in low Earth orbit), generate enough signal strength to deliver two-way broadband to a handheld device — something AST argues smaller satellites physically cannot do. AST does not sell directly to consumers. Instead, AST partners with Mobile Network Operators (MNOs), who offer SpaceMobile as an add-on to their existing plans when subscribers leave terrestrial coverage. The MNO handles billing and customer relationships; AST provides the satellite network and splits revenue, historically on a roughly 50/50 basis. AST has definitive commercial agreements with AT&T, Verizon, Vodafone, and Saudi Telecom, plus preliminary agreements with over 50 MNOs covering nearly 3 billion subscribers globally. AST is still pre-commercial scale — current revenues come from U.S. government contracts, ground equipment sales to MNO partners, and early test activations. AST's full commercial ramp depends on constellation buildout: AST targets 45–60 Block 2 satellites in orbit by end of 2026 for continuous coverage in key markets, and 90+ satellites for global coverage. The U.S. government is a second revenue stream, with AST's large, high-power satellites serving dual-use defense applications. AST estimates satellite costs of roughly $21–23M per unit and targets ~95% vertically integrated manufacturing to control costs and production cadence.