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Cell phone, wireless telephone that permits telecommunication within a defined area that may include hundreds of square miles, using radio waves in the 800–900 megahertz (MHz) band. To implement a cell-phone system, a geographic area is broken into smaller areas, or cells, usually mapped as uniform hexagrams but, in fact, overlapping and irregularly shaped. Each cell is equipped with a low-powered radio transmitter and receiver that permits propagation of signals between cell-phone users. See also mobile telephone.
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or cell·phone
a wireless telephone using a system of low-powered radio transmitters, with each transmitter covering a distinct geographical area (cell ), and computer equipment to switch a call from one area to another, thus enabling broad-scale portable phone service.
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