Unlocked VKWORLD F1 MTK6580-1.3GHz Quad-core 4.5"&nbsp;FWVGA+IPS&nbsp;Screen Android&nbsp;5.1 Rom 8GB+Ram 1GB 3G Smart phone (Red) 4.5 inch FWVGA + IPS screen, 854 x 480 screen resolution Android 5.1 operating system Use a MTK6580-1.3GHz Quad-core, along with 1GB RAM and 8GB internal storage Powered by 1850mAh lithium battery Support Bluetooth, WiFi, GPS, FM Radio, GSM & WCDMA