Mobile or cellular phone

Phone with multimedia keys.The evolution of mobile phones from 1998 to 2007. The mobile phone is an electronic device that allows wireless access to the cellular network or mobile. Cell is called in most Latin American countries because the service operates through a network of cells, where each antenna signal repeater is a cell, although there are satellite mobile telephone networks. Its main feature is its portability, which allows you to communicate from almost anywhere. The main function is voice communication such as telephone. From the century, mobile phones have acquired features that go far beyond simply just call or send text messages, it could be said to be unified (not replaced) with various devices such as PDA, camera , electronic calendar, alarm clock, calculator, micro-projector, GPS or multimedia player and can perform many actions on a small portable device that takes virtually everyone in developed countries. This type of evolution of the mobile phone is called smartphone. The first record is about the mobile phone company Motorola DynaTAC 8000X with your model. The model was designed by engineer Rudy Krolopp Motorola in 1983. The model weighed just under a kilo and was worth nearly U.S. $ 4000. Krolopp then the team will incorporate research and development led by Martin Cooper Motorola. Both Cooper and Krolopp appear as owners of the original patent. From the DynaTAC 8000X, Motorola would develop new models like the Motorola MicroTAC, launched in 1989 and the Motorola StarTAC, released in 1996 to market. Currently have major mobile touch phones that follow the wake of the iPhone.




operation

Telephone communication is made possible by the interconnection between mobilestations and public.
According to the bands or frequencies which operates the mobile, can operate in one part or another of the world.
Mobile telephony is a combination of a network of transmitting stations, receiving stations (repeaters, base stations or BTS) and a series of telephone switching 1st and5th level (MSC and BSC, respectively), which enables communication betweenportable telephone terminals (mobile phones) or between mobile terminals and fixed network phones traditional.
In operation the mobile phone communicates with a base station, and as you move, the computer systems that manage the network are changing the call to the next base station, transparently to the user. That's why it is said that the base stations form a network of cells, which honeycomb, each base station serving the mobile devices thatare in his cell.


With the advent of digital mobile telephony, it was possible to access Internet sites specially designed for mobile, known as WAP. The first connection is made via a phone call to a number of the operator through which data were transmitted in a similar way as you would a PC modem. Subsequently, born GPRS, allowing Internet access through TCP / IP. Using the proper software can be accessed from a mobile terminal to services such as FTP, Telnet, instant messaging, e-mail using the same protocols as a conventional computer. GPRS speed is 54 kbit / s in optimal conditions, and is charged according to the amount of information transmitted and received. Other newer technologies that allow Internet access are EDGE, EVDO, HSPA and WiMAX. Moreover, an increasing supply of tablets (type iPad, Galaxy Tab, ebook or similar) for operators to connect to the internet and make calls (GSM 3G tablets) .1 Taking advantage of UMTS technology, begin to appear PC modems that connect to the Internet using the wireless network, achieving speeds similar to ADSL. This system is still expensive because the charging system is not a true flat rate, but some operators to establish limitations on data or speed (with the notable exception of Vodafone).Moreover, these phones can connect to WiFi 3G base (also called gateways 3G2 3) to provide Internet access to a wireless network doméstica.4 5 In 2011, 20% of broadband users intend to change their fixed connection for a mobile Internet connection.