Released in February 2009, the RIM Blackberry Curve features an improved trackball and a screen with higher resolution screen. In general, BlackBerry Curve 8900 offers a sleeker design and a vibrant display. The smartphone includes Wi-Fi, Bluetooth, and GPS, and brings new productivity tools, a full HTML Web browser, and a 3.2-megapixel camera. There’s also support for the BlackBerry App World and AT&T Navigator. But there is a pretty serious drawback – it doesn’t support 3G.