Team Win Recovery Project 3.x, or twrp3 for short, is a custom recovery built with ease of use and customization in mind. Its a fully touch driven user interface no more volume rocker or power buttons to mash. The GUI is also fully XML driven and completely theme-able. You can change just about every aspect of the look and feel.
- Flash latest Sony update for your variant.
- Unlock your bootloader using the official guide
- Update your bootloader using instructions from here
- Flash recovery through fastboot (fastboot flash recovery file_name.img)