3G Mobile

International Mobile Telecommunications-2000 (IMT-2000), better recognized as 3G or 3rd Generation, is a family of standards for mobile telecommunications satisfying specifications by the International Telecommunication Union, which includes UMTS, and CDMA2000 as well as the non-mobile wireless standards DECT and WiMAX. Although the GSM EDGE standard also fulfils the IMT-2000 specification, EDGE phones are normally not branded 3G. Services consist of wide-area wireless voice telephone, video calls, and wireless data, all in a mobile environment. Compared to 2G and 2.5G services, 3G allows immediate utilize of speech and data services and higher data rates (at least 200 kbit/s peak bit rate to fulfill to IMT-2000 specification). Today's 3G systems maintain in practice offer up to 14.0 Mbit/s on the downlink and 5.8 Mbit/s on the uplink.

The first pre-commercial 3G network was commenced by NTT DoCoMo in Japan branded FOMA, in May 2001 on a pre-release of W-CDMA technology. The first commercial begin of 3G was also by NTT DoCoMo in Japan on 1st October 2001, although it was originally somewhat restricted in scope; broader accessibility was deferred by apparent concerns over reliability. The second network to go commercially exist was by SK Telecom in South Korea on the 1xEV-DO technology in January 2002. By May 2002 the second South Korean 3G network was by KT on EV-DO and thus the Koreans were the first to observe competition among 3G operators.

The first European pre-commercial network was at the Isle of Man by Manx Telecom, the operator then owned by British Telecom, and the first commercial network in Europe was launched for business by Telenor in December 2001 with no commercial handsets and thus no paying customers. These were mutually on the W-CDMA technology.
The first commercial United States 3G network was by Monet Mobile Networks, on CDMA2000 1x EV-DO technology, but this network contributor later close up operations. The second 3G network contributor in the USA was Verizon Wireless in October 2003 also on CDMA2000 1x EV-DO. AT&T Mobility is also a true 3G network, having accomplished its upgrade of the 3G network to HSUPA.
The first pre-commercial exhibition network in the southern hemisphere was built in Adelaide, South Australia by m.Net Corporation in February 2002 using UMTS on 2100 MHz. This was a manifestation network for the 2002 IT World Congress. The first commercial 3G network was commenced by Hutchison Telecommunications branded as three in March 2003.

By June 2007 the 200 millionth 3G subscriber had been linked. Out of 3 billion mobile phone subscriptions widespread this is only 6.7%. In the countries where 3G was launched first – Japan and South Korea – 3G infiltration is over 70%. In Europe the most important country is Italy with a third of its subscribers migrated to 3G. Other leading countries by 3G migrations consist of UK, Austria, Australia and Singapore at the 20% migration level. An impenetrable statistic is counting CDMA2000 1x RTT customers as if they were 3G customers. If using this definition, then the total 3G subscriber hold would be 475 million at June 2007 and 15.8% of all subscribers worldwide,

In December 2007, 190 3G networks were operating in 40 countries and 154 HSDPA networks were running in 71 countries, according to the Global Mobile Suppliers Association (GSA). In Asia, Europe, Canada and the USA, telecommunication companies use W-CDMA technology with the maintenance of around 100 terminal designs to run 3G mobile networks.
Roll-out of 3G networks was deferred in some countries by the gigantic costs of additional spectrum licensing fees. In many countries, 3G networks do not use the same radio frequencies as 2G, so mobile operators must erect completely new networks and license entirely new frequencies; an exception is the United States where carriers manage 3G service in the same frequencies as other services. The license fees in some European countries were particularly high, encouraged by government auctions of a inadequate number of licenses and sealed bid auctions, and initial enthusiasm over 3G's promising. Other delays were because of the expenses of upgrading equipment for the new systems. 
T-Mobile, a major Telecommunication services contributor has recently rolled out a list of over 120 U.S. cities which will be offered with 3G Network coverage in the year 2009.