Originally Posted by
Seattle Forrest
Both the inReach and SPOT work through the Iridium satellite constellation and do not require cellular coverage. But they have a monthly fee.
Not just the $14 or so monthly fee for the tracking and system service, Garmin also charges $35 per year for the account. You can suspend the $15 tracking service but they will hit you up for the yearly fee.
But SPOT and InReach are the only systems that can track when there's no cell service.