Ookla Testing Exposes Starlink Direct-to-Device Gap
Ookla Benchmark Testing Exposes Performance Gap in Starlink Direct-to-Device Network
Controlling satellite signals across rugged national routes in the United States, recent Ookla Speedtest and RootMetrics data reveals that terrestrial cellular networks substantially outperform SpaceX’s Starlink direct-to-device (D2D) service in both speed and delivery reliability. While Starlink’s $8 billion spectrum investment aims to position the company as a major mobile carrier, controlled drive-route testing conducted by RootMetrics in the second half of 2026 shows satellite-delivered text messages reaching a success rate of 86% with a median delivery time of 16.6 seconds. By comparison, representative terrestrial cellular networks achieved a 98.1% success rate with an average delivery time of just 1.3 seconds.
The Tech TL;DR:
We definitely need to explain this in detail. Veterans of the cellular industry look at the chess board of existing pieces and don’t see a solution. They don’t understand that SpaceX is developing entirely new pieces that fundamentally alter the strategic landscape.
- Starlink D2D connections helped reduce T-Mobile’s total dead zones, with tests recording no signal dropping from 2.01% in late 2024 to 0.50% in late 2026 along national routes.
- Terrestrial cellular networks vastly outperform satellite links, delivering text messages in 1.3 seconds versus 16.6 seconds over Starlink D2D, with significantly higher data reliability.
- Crowdsourced background data shows that U.S. satellite mobile usage peaks during the summer months and over weekends, driven heavily by travel to high-elevation and remote regions.
RootMetrics Testing Reveals Latency and Reliability Metrics
The performance delta between ground towers and Low Earth Orbit constellations becomes stark during data transmission benchmarks. During RootMetrics “lite data” trials—which measure how reliably a smartphone downloads a small 30 KB file—Starlink’s D2D network achieved full success in 60% of tests.
US Leads D2D Market Volume with Seasonal Spikes
Despite performance constraints, user adoption continues to scale across global markets. Ookla background data indicates that the United States represented the largest D2D market by volume in September 2026, accounting for roughly 41% of all tracked satellite usage due to the sheer volume of compatible handsets in circulation. Usage patterns also exhibit clear seasonal and geographical spikes. In the U.S., D2D connections consistently climb during summer months—surging 29% higher than winter levels—and increase during weekends and at high elevations like the Rocky Mountains. California generated the largest share of national D2D usage over the past year at 10%, followed by Kentucky at 7%, and Colorado, Oregon, Pennsylvania, and Washington at 4% each. Meanwhile, operators like T-Mobile report that satellite usage remains a tiny fraction of total network traffic, representing roughly 0.0003% of overall summer network usage, even as the technology successfully bridges coverage gaps in remote territories.