The Irdium satellite network is the most reliable and the only one to offer complete global coverage, including polar regions as its constellation consists of 66 satellites orbiting the earth. Iridium offers military grade equipment, and its Iridium 9555 satellite phone is used extensively by the Canadian and US armies. For matters of life and death the Iridium 9555 or the Iridium 9575 Extreme satellite phone is the only choice.
For price point, the Inmarsat Isatphone Pro offers the best value at $629, including shipping. The airtime is cheaper as well, with minutes starting at about 99 cents per minute.
Do the Airtime Minutes expire?
Yes. Iridium minutes expire within 6 month to 2 years, depending on the plan. Isatphone Pro minutes are valid for 2 years.
Click here to see the Frost & Sullivan independent report comparing the Iridium 9555 satellite phone against the Inmarsat Isatphone Pro.