Get your device to 16.0.B.2.13 (Go to Settings>>About Phone>>Baseband Version)
If your device is already on 16.0.B.2.13 then it is ok but if there is something else then follow this guide
*Download wmshua
*Download ftf file of 16.0.B.2.13
*Install Sony PC Companion
*Switch Off your mobile phone and get the Original USB Cable pf your device
*Open Wmshua and then Connect your device to PC pressing the Volume Down Key
*As Soon as connected Wmshua will install device drivers (taking about a minute), then go to "Flash" option and select the ftf file from there. And click on Start. It will take about 10 minutes or maybe more to flash the file. Wait Till It Completes.
*Now your device is ready on 16.0.B.2.13
*(If you are having problem with the language of wmshua the go to C:\Program Files(X86)\完美刷机 then rename the folder "language" to "language_x" language will become English)
If your device is already on 16.0.B.2.13 then it is ok but if there is something else then follow this guide
*Download wmshua
*Download ftf file of 16.0.B.2.13
*Install Sony PC Companion
*Switch Off your mobile phone and get the Original USB Cable pf your device
*Open Wmshua and then Connect your device to PC pressing the Volume Down Key
*As Soon as connected Wmshua will install device drivers (taking about a minute), then go to "Flash" option and select the ftf file from there. And click on Start. It will take about 10 minutes or maybe more to flash the file. Wait Till It Completes.
*Now your device is ready on 16.0.B.2.13
*(If you are having problem with the language of wmshua the go to C:\Program Files(X86)\完美刷机 then rename the folder "language" to "language_x" language will become English)