FCC clears SpaceX Starlink Mobile next-gen D2D constellation: up to 15,000 VLEO sats, spectrum-lease waiver

Core Background & Industry Pain Points

Direct-to-device (D2D) satellite cellular has mostly meant dead-zone messaging: Starlink Mobile V1 in the US (via T-Mobile as T-Satellite) runs on roughly 650 dedicated satellites at ~4 Mbps-class speeds—too thin for native voice/streaming. The SCS framework also tied satellite operators to terrestrial spectrum leases. SpaceX filed a separate D2D constellation application in Sept 2025 (ICFS SAT-LOA-20250916-00282), parallel to the Jan 2026 Gen2 broadband expansion to 15,000 sats (DA-26-36). On 2026-10-06, the FCC Space Bureau and Wireless Telecommunications Bureau granted-in-part the “SpaceX D2D Constellation” (call sign S00735) under DA-26-1078.

Architecture Highlights & Internals

Up to 15,000 NGSO satellites in nine shells at 326–335 km VLEO (inclinations 26°–96.87°). Services: US MSS + Supplemental Coverage from Space (SCS), ex-US MSS / Direct-to-Cell, plus Ka/V/E/W FSS feeder and TT&C. The Order text clears T-Mobile PCS G Block (1910–1915 / 1990–1995 MHz) alongside EchoStar-assigned AWS-3 (1695–1710), AWS-H (1915–1920 / 1995–2000), and 2 GHz MSS (2000–2020 / 2180–2200); full commercial use awaits EchoStar Step Two (LEOP/testing allowed earlier). Key waiver: §25.125(a)/(b) no terrestrial spectrum lease required for SCS on AWS-3/AWS-H because SpaceX will hold the matching terrestrial licenses—opening a path to compete as a facilities-based wireless provider. 2020–2025 MHz and broader ex-US 1429–2690 MHz requests were deferred.

Authoritative Benchmarks & Measured Scores

The FCC Order is an authorization with conditions—no Mbps scoreboard. Press (e.g. PCMag) cites SpaceX’s ~150 Mbps/user peak target vs ~4 Mbps on V1; those are company/press figures, not Commission measurements. Hard milestones: surety bond by 2026-11-04; 50% of authorized sats by 2032-10-07, remainder by 2035-10-07. Treat tweet hype as targets, not SLAs. This D2D grant is separate from the Jan 2026 Gen2 15k broadband authorization (~30k authorized across both, excluding Gen1).

Developer Hands-on Guide

1. Read FCC document page and DA-26-1078A1.txt. 2. For product/compliance: watch 3GPP NTN, 911/§9.10(t) routing, and AWS-3 federal protection-zone coordination. 3. Timeline hinges on EchoStar Step Two and first V2 launches—this is a regulatory green light, not nationwide 5G already on. 4. Do not conflate this D2D constellation with the Gen2 broadband 15k grant.