RIM BlackBerry 8820

 RIM's BlackBerry 8820 is a quad band smartphone that builds upon the features of the 8700 series. It features a slightly more compact frame than previous BlackBerry models, and still tries to fill the role of a personal digital assistant/phone combination. The 8820 is still capable of the flagship BlackBerry features of Internet browsing, wireless email, SMS and MMS. New features include a media player, a built-in GPS receiver with included BlackBerry Maps, and a trackball above the keypad instead of the older side-mounted trackwheel for navigation. The 8820 also includes a microSD card slot for expansion, and is compatible with downloadable social networking site applications, such as flickr or Facebook.