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Nokia 7900 Prism
One of the first Nokia devices with the breakthrough 'prism' design, the Nokia 7900 Prism led to a range of devices following the same triangular pattern. The device range was not a major hit among consumers but they were innovative and inventive in their aesthetics ideals.
Released just before Christmas 2007, the striking feature was the device's keypad design, which also allowed users to change the keypad's backlight color. It included 2.5G EDGE speeds for faster WAP browsing, and the color screen boasted a 200 pixel-per-inch (ppi) density allowing for a sharper image. Strangely, the top of the device was completely flat -- quite an ugly 'ending' to the device -- that made marketing the product tricky. It does, in fact, look as though the top of the phone was sliced off through an over-zealous image cropping exercise.