BlackBerry Pearl -
BlackBerry Pearl Comparison with other BlackBerry devices
Most BlackBerry devices have a full keyboard. The BlackBerry Pearl uses a modified QWERTY layout on a 4 row 5 column keypad, with a predictive input algorithm known as SureType. Typing on a Pearl is different than on other non-SureType BlackBerry devices.
The Pearl supports the full range of BlackBerry enterprise functionality.
Unlike most BlackBerries, the Pearl includes a music player and other multimedia features. It requires the purchase of a MicroSD memory card to support storage of multimedia files beyond the 64MB provided internally.
Most notably, the Pearl uses a white trackball similar in appearance to a white pearl instead of the traditional BlackBerry scroll wheel. This facilitates horizontal scrolling and is the origin of the Pearl's name. Third-party applications can be used to change the color of the pearl.The BlackBerry Pearl is currently available with several carriers in the United States.
http://en.wikipedia.org/wiki/Blackberry_Pearl
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