When the Grid Goes Dark: How Satellite Phones Keep Us Connected in Emergencies
Iridium operates 66 active LEO satellites in a cross-linked constellation, providing truly global coverage including the poles. Inmarsat uses 3–4 GEO satellites at about 36,000 km altitude to cover most of the globe from roughly 70°N to 70°S, and its IsatPhone 2 offers 8 hours of talk time. Globalstar runs about 48 LEO satellites to provide regional coverage (roughly 50°N to 50°S) with the Globalstar GSP-1700 handset. Thuraya uses two GEO satellites, with Thuraya 4-NGS launched in 2025 to expand service across Europe, the Middle East, Africa, Asia, and Australia, while it does not cover the Americas. Geostationary satellite networks