The phrase "satellite telephones" can also be referred to as "sat phones," "satellite phones," or "global phones." These phones operate off of a network of satellites orbiting Earth, allowing for communication in remote areas where traditional cellular networks may not be available. Other synonyms for "satellite telephones" may include "satcom phones," "inmarsat phones," or "iridium phones," which are brand names for specific types of satellite telecommunications devices. Due to their ability to provide communication in remote and high-risk environments, satellite phones are often used by military personnel, emergency responders, journalists, and adventurers.