A satellite phone or satphone is a phone that sends and receives calls using satellites rather than telephones or cellular broadcasting sites. A sat mobile phones only needs a clear vision of the sky. The advantage of a satellite phone is that it can complete calls from everywhere. A satellite phone can operate in the middle of the Sahara desert, at the peak of Mount Everest, or from a clearing deep-blue within a South African forest. It is an vital tool for far excursions of all kinds, and provides good communication on the seas and in the air.
A disadvantage of a satellite phone is visible delay in communications. The coverage must first pass through to the satellite, go back to an earthbound gateway before being routed to the receiver. The recipient's response will follow the same path in reverse, which takes time to get to the caller. Satellite minutes are also much more costly than cellular minutes.
However, these problems are irrelevant when considering the features that a satellite phone provides. It can make a link to people from areas where no other link is available. It also allows loved ones to stay in touch, like the researchers, adventurers and those in the military service, and provide support connectivity in disasters when cellular sites or landlines might not be working.
The three major satellite networks now are Iridium, Globalstar and Thuraya. Iridium makes use of low orbiting satellites that reduce conversational delays, but more importantly, it is the only present satellite network that offers network worldwide. Rival Globalstar covers about 80% of the earth's landmasses, excluding northern and southern polar regions, while Thuraya covers parts of India, Asia, Africa, the entire Middle East and Europe.
In favor of those who only wish to use a satellite phone on unusual time, you can hire rather than buy . Rental fees start at almost US$40 per week, but this doesn't include talking time, which may cost as high as $1.75 per minute. If buying a satellite phone outright, a contract is necessary with a satellite network, or pre-paid cards may be purchased. Minutes are less expensive with an agreement rather when hiring or purchasing prepaid, but are still more expensive than cellular minutes.
Satellite phones range charges according to network coverage places. Iridium mobile phones are more costly simply because they can make calls anywhere in the world. One current entry-level Iridium satellite phone sells for US$1,275, while other communication phones start out at about half that price, and can be found for a lesser price. Generally, because satellite phones are so costly, they are often purchased used.
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