4.2.2? Why not 4.4.2 . It's much better
Bk up efs with ktool from playstore
Nandroid bk up. Make that in cwm recovery. These are a must for you to do tonight. :thumbup:
BTW its free to get ktool so don't skip backing up you're efs. Also take a COPY of that folder and put it on you're PC. Copy... Don't remove it or delete that folder.