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A mobile phone is a short-range, electronic device --designed
to work on cellular networks with a standard set of additional
services .--
used for data communication supporting many services, and
accessories,
There are several categories of
mobile phones, from basic phones to musicphones , cameraphones and smartphones
incorporatening capabilities as SMS for text messaging, email, access to the
Internet, gaming, Bluetooth and MMS for
sending and receiving photos and video.named
A multi-mode mobile
phone is a phone which is designed to work on more than one GSM radio frequency.
For a GSM phone, dual-band usually means 850 / 1900 MHz in the United States and
Canada, 900 / 1800 MHz in Europe and most other countries. Tri-band means 850 /
1800 / 1900 MHz or 900 / 1800 / 1900 MHz. Quad-band means 850 / 900 / 1800 /
1900 MHz, also called a world phone, since it can work on any GSM network.
For CDMA or TDMA phones, multiple bands usually means it supports both digital
and analog communications.
Other examples of multi-mode, dual, tri or quad band phones are the WCDMA/GSM phone.
and the mobiles covering the DS-WCDMA and MC-CDMA 3G
variants of the CDMA-2000 protocol.
Almost all networks now use one of two
standards, GSM or CDMA.or the iDEN standard..
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).
Phones Types include:
Bluetooth,Camera , Data Cards , E-mail , Flip,Kids' , MP3 , PDA , Prepaid , Slider
,
Video ,Wi-Fi
Main Carriers include:
AT&T , Nextel , Sprint , STi Mobile , T-Mobile , TracFone, Verizon Wireless ,Virgin
Mobile
Main Brands Include:
Motorola , Samsung , Nokia , LG , Sanyo , Sony Ericsson , Audiovox , Kyocera
, BlackBerry ,T-Mobile Branded , Siemens , Palm , HP , Firefly ,
Apple Inc., Audiovox (now UTStarcom), Benefon,
BenQ-Siemens, CECT, High Tech Computer Corporation (HTC), Fujitsu, Mitsubishi Electric, NEC, Neonode, Panasonic (Matsushita Electric), Pantech
Curitel, Philips, Research In Motion (RIM), Sagem, Sanyo, Sharp,Sendo,
Sierra Wireless, SK Teletech, Sonim Technologies, T&A Alcatel, Huawei, Trium
and Toshiba.
Related non-mobile-phone systems
include:
Car phone permanently mounted in a vehicle
with more
powerful transmitters and loudspeaker for handsfree use
Cordless phones which use one or more radio handsets in place of a wired
handset.
Advanced professional mobile radio systems very similar to mobile phone
systems.
Radio phone which covers radios which could connect into the telephone network.
Satellite phone that communicates directly with an artificial satellite
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