Samsung Galaxy Grand 2 DUOS G7102 Unlocked GSM Dual-SIM Smartphone - White 2G: GSM 850 / 900 / 1800 / 1900 (SIM 1 & SIM 2), 3G Network: HSDPA 850 / 900 / 1900 / 2100 5.25" TFT Display Capacitive Multi-Touchscreen Android v4.3 (Jelly Bean) , Quad-Core 1.2 GHz Cortex-A7 Processor, Chipset: Qualcomm MSM8226 Snapdragon 4, Adreno 305 Graphics 8 Megapixel Camera (3264 x 2448 pixels) w/ Autofocus, LED Flash + Front-facing 1.9 Megapixel Camera Internal Memory: 8GB, 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.