pluton
Adventurer
I can conditionally recommend the Inmarsat Isatphone Pro; $550 or so for the phone; satellite always available(geostationary and you already know where it is); text messages billed at 1/3 the minute rate; send and receive email; Bluetooth plus conventional headset jack; slow(1/2 dialup speed) net connectivity. I haven't used it much, but so far it has been perfectly fine and has worked as advertised.