Samsung Note 2 I317 16GB Unlocked GSM 4G LTE Quad-Core Phone - Titanium Silver 2G: GSM 850 / 900 / 1800 / 1900, 3G: HSDPA 850 / 1900 / 2100, 4G: LTE 700 / 1700 / 2100 5.5" Super AMOLED Capacitive Multi-Touchscreen Android v4.1.1 (Jelly Bean), upgradable to v4.4.2 (KitKat), Quad-Core 1.6 GHz Cortex-A9 Processor, Chipset: Exynos 4412 Quad, Mali-400MP4 Graphics 8 Megapixel Camera (3264 x 2448 pixels) w/ Autofocus, LED Flash + Front-Facing 1.9 Megapixel Camera Internal Memory: 16GB, 2GB RAM + microSD Slot Expandable up to 64GB 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.