Satellite Phones

Satellite phones are mobile and fixed phones that use satellites to communicate instead of traditional terrestrial cell towers. This means that they can work in any location on Earth, as long as there is a clear line of sight to the sky. 

Satellite phones are especially beneficial in remote areas where there is no cellular coverage, as well as in disaster situations where the cellular network has been disrupted.

Inmarsat IsatPhone 2

Motorola Defy 2