Before you sign up for Spot etc I see companies are developing Sat phone 'Jackets' to use with your iPhone or Android device:
Thuraya SatSleeve turns Apple's iPhone into a satellite phone
Unless you are heading off on a trip soon, Id be tempted to wait and see how these develop, if they can get these to work as well as a regular sat phone it might be the way to go in the future, hopefully they will get them on the Iridium satellite network for a truly global phone as Thuraya has limited coverage.
I just looked at the Yellowbrick, it does look like the best system out there at the moment, higher initial price than Spot, but much better quality, quite reasonable rates for 2 way comms - and it uses Iridium.
Last edited by Gipper; 6 Aug 2014 at 10:33.
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