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Cellular Phones Subcategories |
The mobile phone or mobile, also called a
cellular phone, or cell phone is a long-range, portable electronic device
used for mobile communication that uses a network of specialized base stations
known as cell sites. In addition to the standard voice function of a telephone,
current mobile phones can support many additional services such as SMS for text
messaging, email, packet switching for access to the Internet, and MMS for
sending and receiving photos and video (camera phones). Most current mobile
phones connect to a cellular network of base stations (cell sites), which is in
turn interconnected to the public switched telephone network (PSTN) (the
exception is satellite phones such as GSM Phones).
In 1908 the U.S. Patent Office issues a U.S. Patent Number 887357 for a
wireless telephone, to Nathan B. Stubblefield of Murray, Kentucky. He applied
this to "cave radio" telephones and not directly to cellular telephony as the
term is currently understood. However, the introduction of cells for mobile
phone base stations, invented in 1947 by Bell Labs engineers at AT&T, was
further developed by Bell Labs during the 1960s. Radiophones have a long and
varied history going back to shore-to-ship radio telephony, through the Second
World War with military use of radio telephony links and civil services in the
1950s, while hand-held cellular radio devices have been available since 1973.
Due to their low costs and rapid deployment, mobile phone networks, and digital
cell phones made by Apple, Blackberry,
HP,
LG,
Motorola,
Nokia,
Palm,
Samsung, and
Sony Ericsson have since spread rapidly throughout the world, outstripping
the growth of fixed telephony.
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