Cellular telephone (also called mobile telephone) became irreplaceable in everyday life of any civilized modern person. Its concept was created by AT&T after the Second World War, but at that moment no technologies for its creation were available. The first cellular telephone for widespread use was presented by Motorola in 1983 and it worked by means of short-wave analog or digital telecommunication in a wireless connection established between a telephone and a relatively nearby transmitter. Tern 'cellular' is used because the system works many base stations divide thus a service area into multiple 'cells'. Cellular calls are transmitted from base station to base station while subscriber travels from cell to cell, like it was practiced in first car (mobile) phones.
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