For those people who want to take there downgrade their Sony phone to kitkat it can be done. It takes time and patience to do. Also a program called flashtool and a windows pc.
Search on Google for Downgrade To 18.3.1C.1.17
Xperiafirmware or xdadevelopers are the best places for information.
Search on Google for Downgrade To 18.3.1C.1.17
Xperiafirmware or xdadevelopers are the best places for information.