Android version: 4.4.2
Build number: 10.5.A.0.230
Customization Version: 1270-4066
[FTF]STOCK (C6602 & C6603) 10.5.A.0.230_R1D
This works on ANY Xperia Z (C6603 & C6602).
Your Xperia Z does NOT have to be rooted.
Your Xperia Z does NOT have to be bootloader unlocked.
This does NOT re-lock a SIM unlocked phone (unlocking is ONCE and PERMANENT).
This does NOT unlock your bootloader