Hello I have an xperia tablet z SGP321 which is currently on android 4.4.2. But it's very buggy atm, and I would like to install a rom on it like omni rom or cm11. But in order to do this I have to root the device, and I would like to know how to root this? Am I able to root it currently or is it not possible atm due to the new software (4.4.2)? I have also tried unlocking the bootloader using the instructions on sony's website and other instructions by other people but they all failed. I know for a fact I did them all correctly and it just didint work. Is this because its not currently possible on android 4.4.2 on this device? Thank you in advance.