How Satellite Phones work?

Have you ever wondered how sat phones manage to send a call over satellite signals? The post will round up some of the key points on how the sat phone operates as a communication channel. A satphone is a mobile phone device that connects to satellites instead of cell phone towers.

Satellite phone systems require a direct line of sight to the satellite for more accessible connections. Thus, when using the satellite device, the user must be outside instead of in a building that may block the signals. In addition, avoid trees and other obstructions that may affect the signal coverage and jeopardize the strength of the call.

Picture of man holding satellite phone and thermocup in hands. He shows it to camera. Young man and woman stand behind

Satellite calls vary depending on the service provider and geographic location. Most sat phone costs per voice call range around $0.15 – $2 per minute. Sat phones also offer pre-paid plans.

How they work

Unlike typical mobile phones that depend on terrestrial network towers for connections, sat phones connect using satellite signals. With a direct line of sight to the satellite, sat phones send radio signals to the available satellite. The satellite transmits the signals to the earth station, which then routes the call to a Public Switched Telephone Network.

Satellite phone service provider transmits from one satellite to another, which has a connection to the Earth station. Sat phones can boldly go where cellular devices can’t.

Features of a Sat Phone

  • Sat phone uses Sim cards – GSM compatibility allows the device to be used as a cellular phone
  • Signal strength displays
  • Encompass solar panels for remote recharging of low battery
  • Text messaging
  • Phone books
  • Call forwarding
  • Paging, data transmission, and faxing capabilities
  • GPS displays of latitude and longitude


Despite relatively high sat phone costs, most people seek the device for its ultimate reliability and convenience in geographical areas with poor connectivity. The device is sought-after mainly by individuals engaging in outdoor activities and personnel associated with aviation, emergency services, maritime, and government services.

Hey guys, I am Aman Singh Bhadouriya. I'm a student of Btech 3rd year and a part-time Blogger who loves writing about Technology and Digital Marketing. I have created Ezad Tech to share my knowledge with others.

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