3G Network
The 3G network, also known as the international Mobile Telecommunications-2000, has services that include wide-area wireless voice telephone, video calls, and wireless data-all on a mobile network. The network enables a wider range of more advanced services while at the same time gaining a greater network capacity. The third generation (3G) of mobile telephony standards are defined as: to facilitate growth, increase bandwidth and support diverse applications [1].
The first pre-commercial and commercial 3G network were both launched by NTT DoCoMo in Japan in the year 2001. South Korea was the first to see competition among 3G operators with the launching of two networks by SK Telecom on the 1xEV-DO technology, and then later KTF on EV-DO. The first commercial U.S. network was launched by Monet Mobile Networks on CDMA2000 1xEV-DO technology. But this was unsuccessful as later it shut down operations. The second was commercial network was by Verizon Wireless, AT&T soon followed with their launch using the HSUPA technology. In June 2007 the 200 millionth 3G subscriber had been connected and by December of that same year 190 3G networks were operating in 40 countries and 154 HSDPA networks were operating in 71 countries [2].
In comparison to the 3G, 2G networks were built mainly for voice services, and have slow data transmissions. And the earlier first generation network, 1G was basically the beginning of wireless telephone tecchnology. Moving to the evolution of the future of 4G networks 3GPP and 3Gpp2 are working on further extensions. They are both based on an all IP network infrastructure and use advanced technologies like MIMO. These are characteristics of 4G but fall short of the bandwidth requirements for 4G [3].

[[1 **^** "broadbandmag.co.uk/3G grinds to a start]]
[[2 **^** "DoCoMo Delays 3G Launch]]
[[3 **^** "T-Mobile 3G Network Expansion: List of U.S. Cities Going 3G in 2008]]