Mobile phone

A cellphone or cellular phone, also known as a mobile phone, is a portable electronic device which behaves as a normal

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telephone whilst being able to move over a wide area (compare cordless phone which acts as a telephone only within a limited range). Cellphones allow connections to be made to the

Related Topics:
Telephone - Cordless phone

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telephone network, normally by

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directly dialing the other party's number on an inbuilt keypad. Most

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current cellphones use a combination of radio wave

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transmission and conventional telephone circuit switching, though packet switching is already in use for some parts of the cellphone network, especially for services such as Internet access and WAP.

Related Topics:
Transmission - Telephone - Circuit switching - Packet switching - Internet access - WAP

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Some of the world's largest cellphone manufacturers include Alcatel, Audiovox, Kyocera (formerly the handset division of Qualcomm), LG, Motorola, Nokia, Panasonic (Matsushita Electric), Philips, Sagem, Samsung, Sanyo, Siemens, SK Teletech, and Sony Ericsson.

Related Topics:
Alcatel - Audiovox - Kyocera - Qualcomm - LG - Motorola - Nokia - Panasonic - Philips - Sagem - Samsung - Sanyo - Siemens - SK Teletech - Sony Ericsson

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There are also specialist communication systems related to, but distinct from cellphones, such as satellite phones and Professional Mobile Radio.

Related Topics:
Satellite phone - Professional Mobile Radio

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