A satellite phone is a type of mobile phone that connects to satellites orbiting the Earth instead of relying on traditional cell towers. This allows users to make calls and send messages from remote locations where cellular coverage is unavailable. Satellite phones are commonly used in areas like oceans, mountains, and deserts, making them essential for adventurers, researchers, and emergency responders. These phones operate by sending signals to satellites, which then relay the communication back to ground stations. Unlike regular phones, satellite phones can work in extreme conditions and are often used in disaster relief efforts, ensuring that people can stay connected even when conventional networks fail.