How do cell phones work?
A cell phone is actually a very sophisticated radio that sends signals to a network of antennas (towers) throughout a service area. These towers are connected to the POTS (plain old telephone system) in the region. When the towers receive the signals, the message is routed through the regular wired phone system to its final destination, either another cell phone or a landline. There are three types of cell phones: Analogue Digital PCS The first generation of cell phones used this technology. They can be used just about anywhere in North America right now, although some carriers are phasing out analogue coverage in favour of digital. The sound quality and security of these connections is not as good as digital or PCS. Many networks are hybrids, that is, they have both analogue and digital signals. Digital cellular phones provide better sound and privacy. They also operate on a different frequency than analogue signals, so they need a different kind of infrastructure (towers and equipmen
