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T-Mobile UK's 'super 3G' high-speed download service will go live on 1 August, the carrier said today. And it pledged to triple the network's performance next year ahead of hitting a whopping 20Mbps by 2011.
Initially, HSPDA technology will provide download speeds of up to 1.8Mbps, though T-Mobile admitted real-world performance is more likely to be around 1Mbps - still rather faster than regular 3G download speeds. The theoretical maximum will rise to 3.6Mbps in 2007, the carrier said, then to 7.2Mbps and 10Mbps in 2008/2009.
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An excerpt from the Wikipedia entry on HSDPA (full text here)...
High-Speed Downlink Packet Access (HSDPA) is a new mobile telephony protocol and is sometimes referred to as a 3.5G (or "3½G") technology. In this respect it extends WCDMA in the same way that EV-DO extends CDMA2000. HSDPA provides a smooth evolutionary path for Universal Mobile Telecommunications System (UMTS) networks allowing for higher data capacity (up to 14.4 Mbit/s in the downlink). It is an evolution of the W-CDMA standard, designed to increase the available data rate by a factor of 5 or more. HSDPA defines a new W-CDMA channel, the high-speed downlink shared channel (HS-DSCH) that operates in a different way from existing W-CDMA channels, but is only used for downlink communication to the mobile.