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This gives a bit of an overview: https://www.iridium.com/Download?resourceID=e8cc663d-0697-43cc-a918-9e8b1e3c5603 A few years ago I'd say Inmarsat, which I've previously used throughout Africa, but now I'd probably go for an Iridium. Besides coverage, dust/water/shockproof is important IMO. |