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FAQ
What is a Mobile phone?
The Mobile phone ( also called cell phone or cellular telephone or mobile handset) is a low powered radio tranceiver that provide voice telephone service to mobile users. Cellular telephones operate as portable telephones; whereas normal telephones require a cord that connects to a jack in order to access the extensive wireline networks operated by local telephone companies, cellular telephones are not restricted by a cord.
Mobile phones work by transmitting radio waves to cellular towers. These towers vary in the area they cover and can receive nearby mobile phone signals from distances as short as 1.5 to 2.4 km (1.0 to 1.5 mi) to distances as long as 48 to 56 km (30 to 35 mi). The area a tower can cover is referred to as a cell; the towers within these cells are networked to a central switching station, usually by wire, fiber-optic cable, or microwave. The central switching station handling cellular calls in a given area is directly connected to the rest of the wired telephone system. Cellular calls are picked up by the towers and relayed to the rest of the telephone network. Since the cells overlap, as a mobile caller moves from one cell into another, the towers "hand off" the call so communication is uninterrupted.
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