Official site : \r facebook : \r download file : \r Warning! Do this at your own risk! All your phone data (conts,photos,videos,music,messages,aplications,games,files,) will be lost! Please make backup first if you can!\r \r 1.Open Sony Pc Companion\r 2.Click on Phone /Tablet Software Update\r 3.Click on Repair my phone/tablet\r 4.Select \r 5.Power off your phone\r 6.Connect microUSB cable to your computer\r 7.Press volume down and connect your phone to microUSB cable when software ask\r 8.Wait until update is complete\r 9.Disconnect your phone from cable and power on\r 10.Wait until phone restarts\r Thats it!