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3G or third generation is technically known as International Mobile Telephonicommunications-2000(IMT-2000).It is a family of standards for mobile phones and networks developed by Telecommunication Union.The IMT-2000 standard offers convergence of voice,data,internet and multimedia services over a single network.
The first generation of cellular services were offered using analogue radio technologies and the second generation(2G) technologies were heralded by the onset of digital networks all over the world during the 1990’s .it was on the wings of these 2G standards that different telecommunication technologoies,such as CDMA(Code Division Multiple Access )and GSM (Global System For Mobile Communications) came into existance .However ,work on 3rd generation mobile standards began when a need was felt for finding a new globally available frequency band in order to optimize convergence between various 2G networks.
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