Samsung Galaxy Note I717 16GB 4G LTE GSM Android Phone - Carbon Blue (AT&T version) 2G: GSM 850 / 900 / 1800 / 1900, 3G: HSDPA 850 / 1900 / 2100, 4G: LTE 700 MHz Class 17 / 1700 / 2100 5.3-inch Super AMOLED Capacitive Multi-Touchscreen w/ Protective Corning Gorilla Glass Android v2.3 Gingerbread (upgradable), Dual-Core 1.5 GHz Scorpion Processor, Chipset: Qualcomm MSM866 Snapdragon, Adreno 220 Graphics 8 Megapixel Camera (3264 x 2448 pixels) w/ AutoFocus, LED Flash + Front-Facing 2 Megapixel Camera Internal Memory: 16GB storage, 1GB RAM + microSD Slot Expandable up to 32GB Unlocked cell phones are compatible with GSM carriers like AT&T and T-Mobile as well as with GSM SIM cards (e.g. H20, Straight Talk, and select prepaid carriers). Unlocked cell phones will not work with CDMA Carriers like Sprint, Verizon, Boost or Virgin.