Following an early look at the phones in China, Nokia today officially launched its Prism Collection handsets. Each of the angular black cellphones focuses style with changing color themes; while the basic 7500 Prism (pictured) sports interchangeable border plates, the 7900 Prism includes an active lighting system that produces any one of 49 different colors and a display with a "living" background that changes subtly with the time of day. The 7900 is also one of the very first cellphones to have a 16.7 million color OLED display that guarantees a vivid picture without cutting into performance.The 7500 is Nokia's starter, localized model with only tri-band GSM network support, dual-band EDGE Internet access, and a reliance on microSD cards for storage. Stepping up to the 7900 provides support for North America through quad-band GSM and 3G wireless support for both the US and Europe; it also builds in 1GB of memory for up to 9 hours of music playback. Either has a 2-megapixel camera with support for both video and photo capture and will ship before the end of the summer. In Europe, the 7500 will sell for 210 Euros ($289) before carrier discounts; the 7900 will be offered in the area for 400 Euros ($551) and may find similar pricing in North America.
7500 Prism (left), 7900 Prism (right)
 
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