Samsung GALAXY S4 I9500 Factory Unlocked GSM Smartphone w/ Octa-Core (8) Processors - White 2G: GSM 850 / 900 / 1800 / 1900, 3G/HSPA+: HSDPA 850 / 900 / 1900 / 21005-inch Super AMOLED Capacitive Multi-Touchscreen w/ Protective Corning Gorilla Glass 3Android v4.2.2 (upgradable) Octa-Core: Quad-Core 1.6 GHz Cortex-A15 & Quad-Core 1.2 GHz Cortex-A7 Processor, Chipset: Exynos 5 Octa 54113 Megapixel Camera (4160 x 3120 pixels) w/ Autofocus, LED Flash + Front-facing 2 Megapixels Camera Internal Memory: 16GB storage, 2GB RAM + microSD Slot Expandable up to 64GB Not For CDMA CArriers Like Verizon Sprint etc Not For T mobile 3G 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.