KATA I3s - 5.0&rdquo; IPS Super HD Quad Core 1.3GHz MTK6582 Unlocked Smartphone Android 4.4 (KitKat) 1GB RAM Dual SIM 3G WiFi 16GB Memory 13MP Back Camera 5MP Front Camera (Dark Grey) GSM Quadband 850/900/1800/1900, 3G WCDMA 850/1900/2100, Android OS, v4.4 (KitKat) 5.0" Super HD Display: FHD (720 x 1280) with 1.3 GHz Quad Core Processor 13MP Camera with LED Flash with HD recording , 5MP Front Camera for Video Calling and instant self portraits. 16GB ROM, 1GB RAM Free 10GB Cloud Backup Powered by KATA Cloud Unlocked cell phones are compatible with GSM carriers like AT&T and T-Mobile as well as with GSM SIM cards (e.g. H20, Straight Talk, and select prepaid carriers). Unlocked cell phones will not work with CDMA Carriers like Sprint, Verizon, Boost or Virgin.