Connect your Xperia device to your computer using a USB cable.
Install the necessary drivers for your Xperia device. You can do this by downloading the Sony USB driver and installing it on your computer. flashtool 0.9.18
Enable USB debugging on your Xperia device. Go to > Developer options > USB debugging . Connect your Xperia device to your computer using
Select the firmware you want to flash, backup, or restore. Developer options >
Use Flashtool 0.9.18 at your own risk. Make sure to backup your device's data before flashing any firmware. We are not responsible for any damage caused to your device.
Wait for the flashing process to complete. This may take several minutes.