tag:blogger.com,1999:blog-72176482246514339922023-06-20T06:10:16.568-07:00Mobile PhonesOmer Nisarhttp://www.blogger.com/profile/04893679198783334463noreply@blogger.comBlogger1125tag:blogger.com,1999:blog-7217648224651433992.post-51456798171190732572009-11-04T11:00:00.000-08:002009-11-04T11:00:03.513-08:003G Mobile PhonesInternational Mobile Telecommunications-2000 (IMT-2000), better known as 3G or 3rd Generation, is a family of standards for mobile telecommunications defined by the International Telecommunication Union,[1] which includes GSM EDGE, UMTS, and CDMA2000 as well as DECT and WiMAX. Services include wide-area wireless voice telephone, video calls, and wireless data, all in a mobile environment. Compared to 2G and 2.5G services, 3G allows simultaneous use of speech and data services and higher data rates (up to 14.0 Mbit/s on the downlink and 5.8 Mbit/s on the uplink with HSPA+). Thus, 3G networks enable network operators to offer users a wider range of more advanced services while achieving greater network capacity through improved spectral efficiency.<br />
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The International Telecommunication Union (ITU) defined the third generation (3G) of mobile telephony standards – IMT-2000 – to facilitate growth, increase bandwidth, and support more diverse applications. For example, GSM (the current most popular cellular phone standard) could deliver not only voice, but also circuit-switched data at download rates up to 14.4 kbps. But to support mobile multimedia applications, 3G had to deliver packet-switched data with better spectral efficiency, at far greater bandwidthsOmer Nisarhttp://www.blogger.com/profile/04893679198783334463noreply@blogger.com0