You might be better off with a satellite sleeve that turns your IPhone into a sat phone. http://www.thuraya.com/SatSleeve
I had 2 satellite phones years back, Globalstar and I forget the other telco or something...
They worked OK, but when you weren't using them, it was like $30 a month just to have the account... and when you did use them - it was like $3 bucks a minute whether the call was incoming or outgoing & that adds up bloody fast.
So for e.g. if your traveling remote for any length of time, you have to pay your sat phone bill at the end of each month or they cut you off... but there's just one problem with that - when you go to their automated bill pay service via the satellite phone the "time delay" doesn't allow you to pay your bill by the Sat phone with your credit card because with the time delay bye the time the computer generated voice asks you to enter your account number or your credit card number or how much you want to pay etc the automated computer at their end thinks you didn't answer and starts with the whole menu options list again and you spend hours trying to pay the bill (at $3 a minute) - so you run up a $500 bill on the one call trying to pay last months bill, and it doesn't work then they cut you off for non payment etc etc!
Another 'problem' is you can't 100% guarantee that the sat phone will always work!. You'd think you can but you can't.
We were out at the Houtman Abrolhos Islands (54 Nmiles off Geraldton) one Easter for a couple weeks all up & had to try and make these calls & couldn't get a Satellite signal for the life of us... there was no obstructed view of the sky in all directions... no hills or trees out there to obscure your view of the sky at all so in theiry you should be able t ping a satellite any time night or day but not so...
Over the 4 days we tried hundreds of times every day (because the matter was urgent) and couldn't raise a soul.,
When we got home we got a bill for like $2000+ for not actually being able to contact anyone at all... so it turns out the Satellite was getting our signal and racking up a $2 or $3 each time hundreds of times a day for the whole Easter period.
BUT - the satellite was unable to connect to the ground station at Meekatharra or somewhere because there had been a thunderstorm and lightening had taken down the mains power connected to the ground receiving station.
The ground receiving station had a automated backup generator system and diesel fuel tank, for just such a scenario BUT some enterprising local abbbadiginies had managed to find this diesel tank and drain it into jerry cans to fill their land cruisers for free and stolen the whole 2000 liters over a period of time and it wasn't till the power went down that anyone realized the tank was dry and there was no backup supply for the backup generator...
So they did try to get emergency delivery of diesel to the ground station tank out of Meekatharra by their fuel delivery contractor over Easter but being Easter their fuel contractor said "sod off, it's Easter, I'll do it first thing Wednesday after Easter when I get back from my long weekend away fishing!".
So while we had 2 Sat phones with us at the Islands we couldn't actually use either... for the whole 5 days of Easter, yet they stil expected me to pay the $2000 bill for connecting to the satellite - even tho the satellite couldn't connect me to anyone down here on earth. They got a rude shock when I told em to whack their sat phones where the sun don't shine...
Its OK if your safe on an Island and you can wait - but maybe not so much if your floating around in a life raft at sea for 4 days with great while sharks (or crocks) wanting to use the raft as a teething ring - it would be preferable if the damn things worked like you think they should.
So they can be good BUT they aren't all that they are sometimes cracked up to be, by people who've never actually had one or the mega bills that go with them!
Just a heads up basically.