BLU Studio Selfie - Smartphone - GSM Unlocked - Grey Unlocked Dual Sim Smartphone, with Android 5.1 Lollipop 1.3 GHz Quad Core Mediatek 6580 processor with ARM Mali-400 GPU 8GB Internal Memory 1GB RAM Micro SD up to 64GB 5.0 IPS Display: 5MP Autofocus Main Camera with LED Flash and 5MP Autofocus Front Camera with LED Flash and BLU Final Touch Software 4G HSPA+ (850/1700/1900/2100). GSM Quad Band: US Compatibility Nationwide on all GSM Networks including AT&T, T-Mobile, Cricket, MetroPCS, Straight Talk USA, Pure Talk USA and others