BLU Advance 5.0 - Unlocked Dual Sim Smartphone - US GSM - Black Unlocked Dual SIM smartphone, with Android 5.1 Lollipop Mediatek 6580 Quad Core 1.3 GHz Processor with arm Mali-400 GPU 5.0" IPS display: 5MP Main Camera with LED flash and 2MP Front Camera; 4GB Internal memory 768MB RAM Micro SD up to 64GB GSM Quad band HSPA+ (850/1700/1900): US compatibility Nationwide on all GSM Networks including AT&T, T-Mobile, Cricket, MetroPCS, Straight Talk, Pure Talk USA and others **VERY IMPORTANT** Please Note: Kindly refer the User Manual & the User Guide before use, which is highly essential.