Originally Posted by [NUT]
you can skip the vroot part in your guide, you can install XZDualRecovery on the unrooted .534 rom. Saves a step prior to updating
thats a problematic point NUT, i've tried that yestarday... flashed the recovery just fine, restarted into TWRP, then i restarted system and asked him to install supersu.
but when i was back into sony rom it sais i need to download supersu from the playstore, and since flashing .534 ruins the 3g reception i couldn't without wifi around...
luckly you don't actually need root to update to 4.4, you just need TWRP working so you can flash the flashable file.