Originally Posted by pananza
Thr Mar 20 14:02:18 2014
That's a stock kernel
D'oh! Its written all over the XDA guides about unlocking the bootloader.
It wont, as this is a XDA development, Sony's official position is that once you unlock you cannot relock officially
I did however perform a BLU "lock" with FlashTool, and it now says my bootloader is locked.
That's not an official relock, there is no official relock, that was said on the official website
However, all over the XDA forums you are advised to make a TA backup before unlocking the bootloader, without pccompanion will never work for you.
You may as well leave your bootloader unlocked for ever..
If you want the latest stock firmware, just flash a FTF ending in 757 that is suitable for your phone
You will be on the latest release and this is how you will have to update from now on.
You should be aware of this from this
page which is the official Sony warning about unlocking the bootloader.