... (Optional),5.5"QHD screen,960 x 540 pixels,Equipped with the Android 4.1.1 OS,WCDMA/GSM,four-bands ... , Mobile AP,wifi,GPS+AGPS,Light sensor,Gravity Sensor,Proximity sensor,Digital compass ... case(Optional) Equipped with the Android 4.0.9 OS GPS+AGPS global positioning navigation system 3G,WIFI 802.11b/g support,EDGE,HSDPA,HSUPA ...