BLU Studio M HD - 5.0" Smartphone -Global GSM Unlocked -Black Unlocked Dual Sim Smartphone, Android V5.1 Lollipop 5.0 HD Full Lamination technology Display with IPS (720X1280) 5MP Autofocus Main Camera and 2MP Front Camera + LED Flash MediaTek Quad Core 1.3GHz Processor with MALI 400 GPU, 16GB Internal Memory 1GB RAM Micro SD up to 64GB GSM Quad Band 4G HSPA+ (850/1900/2100): US Compatibility: AT&T, T-Mobile, Cricket, MetroPCS, and others, including most 3G UMTS/HSPA+ Networks when roaming outside the US