1:Android 2.2.2 operation system 2:Built-in 3G,bluetooth,GPS 3: 3.8 inch, 5 mega pixels 4:Dual sim card,Dual standy Product Specs. Basic ParametersModel No.Hp381RemarksTypeSmart phone, music mobile, photo mobile, 3G cellphone Time to market2011-6-1 Mobile standardGSM+WCDMA dual SIM card dual standby Mobile frequencyGSM/GPRS/EDGE 850/900/1800/1900, WCDMA 900/2100 Operating SystemAndroid OS v2.2 ...