Samsung Galaxy K / S5 Zoom SM-C111 Unlocked GSM Quad-Core Camera / Android Smartphone - White 2G: GSM 850 / 900 / 1800 / 1900, 3G: HSDPA 850 / 900 / 1900 / 2100 4.8" Super AMOLED Capacitive Multi-Touchscreen w/ Protective Corning Gorilla Glass 3 Android v4.4.2 (KitKat), Quad-Core 1.3 GHz Cortex A7 & Dual-Core 1.7 GHz Cortex A15 Processor, Chipset: Exynos 526, Mali-T624 Graphics 20.7 Megapixel Camera (5248 x 3936 pixels) auto/manual focus, 10x optical zoom (24-240mm), optical image stabilization, Xenon & LED flash + Front-Facing 2 Megapixel Camera + Video Internal Memory: 8GB, 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.