So back up your personal data before backing up your firmware.
Loss of data: Flashing of firmware is always a process in which you can lose data. Step 15: As soon as the process ends, Disconnect the Device from the computer and Turn it On. Step 14: Flashing of Firmware will then begin and end in 5-10 minutes. Step 13: After successfully connecting to your computer, you will be able to see the new message in the Xperia Flashtool. Step 12: Press n Hold the Volume down Button and use the USB cable to connect the device to the computer.
Step 11: Turn off your Xperia Device now. Step 10: Now press the flash button to start the process. ftf) into the flash utility to do that click the Load button Step 8: Load the downloaded Xperia software (.