Open the Xperia Flash Tool. You will be greeted with a user interface. Click on the "Flash" button (usually a lightning bolt icon).
This is a high-risk procedure. Do not proceed if you are uncomfortable with command-line interfaces or have never flashed a Sony device before. You will need: sony sov33 lock remove ftf top
The Flashtool will wait for the device.
Flashtool will now begin writing the "Top" firmware partitions to the phone. You will see a progress bar filling up. Do not touch the phone or the cable. Open the Xperia Flash Tool