CELL PHONES
A mobile phone or cell phone is an electronic telecommunications device with the same basic capability
as a
conventional fixed-line
telephone, but which is also entirely portable and is not required to be connected with a wire to the telephone network.
Most current mobile phones connect instead to the network using a wireless radio wave transmission technology (the exception is satellite phones). These mobile phones communicate via a cellular network of base stations (cell sites), which is in turn linked to the conventional telephone network
Some of the world's largest mobile phone manufacturers include Alcatel, Audiovox, Fujitsu, Kyocera (formerly the handset division of Qualcomm), LG, Motorola, NEC, Nokia, Panasonic (Matsushita Electric), Philips, Sagem, Samsung, Sanyo, Sharp, Siemens, SK Teletech, Sony Ericsson, and Toshiba.