i have a rooted x with overclocking. i got the ota the other day and it failed. curious what i need to do to get the ota to work. i tried to unroot but that didnt work. i used Z4 root. i also have changed alot of apk files to bak. do i have to switch them all back to apk unroot and then do factory reset? or can i just unroot and do factory reset then do the ota then reroot?