Samsung CorbyPRO B5310 Unlocked GSM Touchscreen / Keyboard Slider Phone - Red/Black 2G: GSM 850 / 900 / 1800 / 1900, 3G: HSDPA 900 / 2100 2.8-inch Resistive Touchscreen + Physical QWERTY keybaord Operating System: Proprietary, Stereo FM Radio with RDS 3.2 Megapixel Camera (2048 x 1536 pixels) + Front-Facing Camera and Video Internal Memory: 150MB + microSD Slot Expandable up to 16GB