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 VGA Camera 4GB Internal memory 512 MB RAM Micro SD up to 64GB GSM Quad band 4G 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