Nokia Lumia 820 RM-824 8GB Unlocked GSM 4G LTE Windows 8 Cell Phone - Black (No Warranty) GSM 850 / 900 / 1800 / 1900, 3G Network: HSDPA 850 / 900 / 1900 / 2100, 4G Network: LTE 700 / 1700 4.3" AMOLED Capacitive Multi-Touchscreen w/ Nokia ClearBlack display Microsoft Windows Phone 8 (upgradeable to WP8), Dual-Core 1.5 GHz Krait Processor, Chipset: Qualcomm MSM896 Snapdragon, Adreno 225 Graphics 8 Megapixel Camera (3264 x 2448 pixels) w/ Carl Zeiss Optics & Dual-LED Flash + Front-Facing VGA Camera + Video Internal Memory: 8GB, 1GB RAM + microSD Slot Expandable up to 64GB