GuDenns 800XX Android 5.1 Smartphone MTK6580 1.3GHZ Quad-Core 1GB RAM 8GB ROM 5.0" QHD Screen 8MP Camera WCDMA/GSM (Silver) Most updated Android 5.1 operation system. Running fast and smoothly on MTK6580 quad-core 1.3GHz processor Unlocked for all countries with multiple language choices, support standby of two SIM cards (a 2G card and a 3G card, only one active) 5.0 inch IPS screen of 960 x 540 pixels definition, giving you best watching and gaming experience. User-friendly interface and buttons, preinstalled with all necessary daily-used apps 1G ram combines with 8G rom, support external storage with an up to 64G SD card. 8MP rear camera and 5MP front camera, both are strengthened with flash light Up to 180 hours standby ensured by a 2200mAh battery, save energy in smart power-saving mode. Your purchase is protected by our 12-month warranty service. This unlocked cell phone is compatible with GSM carriers like AT&T. It will not work with CDMA carriers like Verizon Wireless, Alltel and Sprint. Can suport T-moblie GSM WCDMA, but not support CDMA T-mobile.