BLU Vivo XL Smartphone - 5.5" 4G LTE - GSM Unlocked - Midnight Blue Aesthetically engineered for a flawless liquid metal finish, vivid 5.5" display HD Super AMOLED Color + Corning Gorilla Glass 3; with Immediate Upgrade to Android 6.0 Marshmallow via OTA 16GB Internal memory 2GB RAM and Micro SD up to 64GB 13MP Main Camera and 5MP Front Camera + PDAF technology and Blue lens MediaTek 6753 64-Bit 1.3GHz Octa Core Processor with MALI-T720 GPU 4G LTE, (2/4/7/12/17), 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, Pure Talk USA, and others. Please refer the User manual before use.