Samsung Galaxy S5 Mini G800F 16GB 4G LTE Unlocked GSM Android Quad-Core Smartphone - Blue 2G: GSM 850 / 900 / 1800 / 1900, 3G: 850 / 900 / 1900 / 2100, 4G: LTE 800 / 850 / 900 / 1800 / 2100 / 2600 4.5 Super AMOLED Capacitive Multi-Touchscreen w/ Protective Corning Gorilla Glass 3 Android v4.4.2 (KitKat), Quad-Core 1.4 GHz Processor 8 Megapixel Camera (3264 x 2448 pixels) w/ Autofocus & LED Flash + Front-Facing 2.1 Megapixel Camera Internal Memory: 16GB, 1.5GB 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.