Everywhere you go even at the Top of the world, Iridium everywhere. Although the wireless environment we live in grows: it still depends on tower, electricty and on a lot of manpower. Not Iridium: two centers on the eartyh, 66 satellites around the earth, and Voila.
There are NO places on earth where calls can't be initiated or received. The portable (hand-held) satellite phone Motorola with Iridium service works throughout airspace (Aviation Applications), ocean (Maritime Applications), wilderness throughout all continents & oceans, without considering the communication system in place in the country. It will improve your safety: Consider it as an inexpensive insurance if you are stuck, as a contingency device if some unforeseen event happens. The Iridium network integrates land-based phone lines and satellites. Iridium is a global wireless telephone company that operates the world's first satellite base personal mobile communications network. By combining the reach of 66 Low Earth Orbital satellites (LEO), Iridium allows customers to communicate with worldwide hand-held telephone & pager.