Interesting Facts About Cell Phones

Mobile (phone celular) is a wireless, portable, long-range, electronic telephone directories, which can easily change while driving antenna connections, from one radio cell to another radio cell reception, without dropping or losing the call underway.

In addition to the standard voice function of a telephone, you have the latest cell phones (celular phone) functions such as SMS for text messaging, MMS multimedia messaging, radio, games, Internet connectivity for e-mail, browsing,Blogging, music (MP3), voice recording, cameras and camcorders, ringtones, personal organizers, Push to Talk (PTT), infrared and Bluetooth connectivity, call registers, streaming video, video downloads, video calls and built-in as a modem Wireless PC that can be used to connect to the Internet.

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The performance in a mobile (phone celular) is a rechargeable battery that can be loaded from the network, a USB port or a cigarette lighter in a preservedCar. Nickel Metal Hydride were the most common types of batteries, which due to the "memory effect" (the user can recharge only when the entire process of discharge of the battery) have been replaced by lithium-ion batteries, which do not suffer from memory effect.

Cell phones (celular phone) arises because the invention of hexagonal cells in 1947, was for the base stations of Bell Labs engineers at AT & T. This developed in 1960 by Bell Labs. During acall, the channel frequency could not be changed automatically from one cell (base station coverage area) to another cell (base station coverage area), because the person who traveled from the area of ​​a cell to area of ​​another cell. Amos Joel of Bell Labs invented a breakthrough invention and called it a `call transfer` in which the channel frequency can be changed automatically from one cell to another cell, during the call the mobile user traveled from one cell to another cell. Duetheir heavy construction, these phones are mainly used in cars.

The first practical cell phone in a non-vehicle unit setting, and which are handheld was, by Martin Cooper, the General Manager (Communications Division) of Motorola, which has asked the telephone world `s first handheld cell (celular phone ) invented in April 3, 1973.

The technology, which operates the cell phone (celular phone) depends on the mobile operator, but all the electromagneticRadio waves, which are in contact with a cell (base station). The base station has multiple antennas, which are composed of a tower mounted tree or a building. Sites cells are spread over a distance of 5 to 8 miles (approximately 8 to 13 km) between them. The low power transceiver from the phone transmits voice and data services to the nearest cell. During the movement, the mobile phone "transfer" of information to other cells in place. Mobile operators use many technologies to maintainsteady stream of digitized data from cell phone to your site and vice versa.

The wireless phone technologies are grouped under the heads of generations known, starting from zero generation or 0g. The current generation is going to 4G, but there are old cell phones (celular phone), still working on 1G, 2G and 3G technologies. The cellular network technologies are used in every generation, as follows:

0G: PTT, MTS, IMTS, AMTS, OLT, MTD, autotelic / PALMARP
1G: NMT, AMPS / TACS / ETACS, HiCap, CDPD, Mobitex, DataTAC
2G: GSM, iDEN, D-AMPS, IS-95/cdmaOne, PDC, CSD, PHS, GPRS, HSCSD, Widen, 1xRTT/IS-2000 CDMA2000, EDGE (EGPRS)
3G W-CDMA, UMTS (3GSM), FOMA, TD-CDMA/UMTS-TDD, 1xEV-DO/IS-856, TD-SCDMA, GAN (UMA), HSPA, HSDPA, HSUPA, HSPA +, HSOP
4G: UMB, UMTS Revision 8 (LTE), WiMAX
Frequency bands: SMR, cellular, PCS

The effects of cell phone (celular phone) use on human health of the main worries of the world.Scientific studies in Copenhagen, the Danish Institute of Cancer Epidemiology, National Cancer Institute and the Institute of Cancer Research, to establish a link between cancer and cell phone use. However, undertook an intergovernmental agency IARC (International Agency for Research on Cancer), the World Health Organization of the United Nations, a study of 4,500 users and found a statistically significant association between cell phone use and the frequency cancer.Further research is underway.

Mobile (phone celular) usage and driving is a common phenomenon around the world. Some countries have banned the use of handheld cell phones while driving, but allows hands-free mode using the phone while driving. However, some studies have shown that the distraction from the conversation has been found, therefore, carry both manual and hands-free mobile phones in road accidents. Further studies on cell phone use and drivinggoing on.

Nokia Corporation is currently the world`s largest manufacturer of cell phones (telefone celular). Other notable cell phone manufacturers, in alphabetical order, are 3G, Audiovox (now UT Starcom), Benefon, BenQ-Siemens, Fujitsu, High Tech Computer Corporation (HTC), Kyocera, LG Mobile, Motorola, NEC, Panasonic (Matsushita Electric), Pantech Curitel, Philips, Research In Motion, Sagem, Samsung, Sanyo, Sharp, Siemens, Sierra Wireless, SK Teletech, Sony Ericsson, T&A Alcatel, Toshiba, and Verizon.

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Interesting Facts About Cell Phones