it's easy!
check a compatible frimware with SEMCtool 8.4!
download it from topsony!
then flash it with SEmcTool 8.4(flash ONLY main, because this program can't complete phone and your phone will be a brick!!!)
then read all codes!
after it flash back your original main!(only MAIN)
press left star star left!
then type the code in the first menu!!
your phone is unlocked!!!!!!!