BLU Quattro 4.5 HD D450 Unlocked Phone with NVIDIA Tegra 3 Quad-Core Processor, Android 4.0, Super IPS LCD Touchscreen, Gorilla Glass, and 8MP Camera - U.S. Warranty (Black) Unlocked, 16 GB storage, 1 GB RAM; Android OS, v4.0, v.4.0.4 (Ice Cream Sandwich) Super IPS LCD2 capacitive touchscreen, 16M colors 720 x 1280 pixels HD Resolution 4.5 inches (~312 ppi pixel density), 3G HSPA+ 850/900/1700/1900/2100 NVIDIA Tegra 3 1.5 GHz Processor for high-end gaming on your smartphone Primary: 8 MP, 3264x2448 pixels, autofocus, LED flash / Secondary: 1.3 MP, 720p 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.