25/06
2006
2006
Samsung New HSDPA Cell Phones – SGH-ZX20 and ZV50
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The Korean Samsung Electronics announced its plan to release its new HSDPA cell phones to the market later this month. Those are the SGH-ZV50 model that will be only see the light of France, Italy and Germany, and the SGH-ZX20 HSDPA phone that set to be available in North America by Cingular. Both models are physically similar – a 1.3 megapixel camera module, Bluetooth V2.0 connectivity, and external memory card slot for unlimited storage possibility. The only different, apart from the model name, is the network support. The SGH-ZX20 will support quad-band (850/900/1800/1900) GSM and WCDMA network, along with 2.5G’s EDGE.
However, data transfer rate via HSDPA will be limited to 1.8MBps.
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. (source)
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