Knowledge is Knowing...

or Knowing where to find out. - Alvin Toffler

There are two main flavors of 3G: UMTS (Universal Mobile Telephone Service), which is rolled out over existing GSM networks, and CDMA2000, which brings 3G speeds to CDMA networks; for a detailed explanation of terms, see the glossary. Both UMTS and CDMA2000--which has two high-speed offshoots, the data-only 1xEV-DO and the voice-plus-data 1xEV-DV--are already available in major cities and select suburban areas with further expansion set for the future. Speeds for both should be about DSL level. AT&T has also launched a 3.5G speed network in 2006 dubbed HSDPA (High-Speed Downlink Packet Access), which starts off at around 1.8Mbps and can theoretically get speeds of up to a blistering 14.4Mbps. There have also been talks of 4G technologies such as WiMax, which should provide even faster speeds.

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