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Cell phone in use, c. 2006.
Cell phones are now more commonly referred to as smartphones, as most models offer Internet connectivity.
cell phone
communications
Also known as: cellular phone, cellular telephone, mobile cellular phone, mobile phone
- In full:
- cellular telephone
- Key People:
- Martin Cooper
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 permit propagation of signals between cell-phone users. See also mobile telephone and smartphone.