A phone that shows no cellular service is not necessarily a communication dead end. With the right device, network, and airtime plan, satellite SIM cards can keep a field crew reachable, give a solo traveler a reliable voice line, or provide a vessel with a backup communications path far from...

A satellite phone that has not been activated is just extra weight in a pack, vehicle, or go-bag. Prepaid Iridium SIM card activation should be completed and tested before your team reaches a trailhead, departs a marina, enters a disaster area, or rolls beyond cellular coverage. The process is straightforward,...

A satellite phone that works at the trailhead but loses service on a high-latitude flight route, offshore passage, or Arctic project site is not a communications plan. This Iridium vs Inmarsat coverage comparison focuses on the practical question that matters before deployment: where will your people, vessel, vehicle, or expedition...