[One (M7) General] Delgra:
No problem bro. It won't be difficult.

First of all you need to check if you are S-Off (not only rooted but S-Off. No S-Off means No possibility to change CID (aka Carrier ID) that is the bad guy which determines if you can get a certain update or not. Usually HTC__001 is a good guy, but not today. So if you are impatient you can choose HTC__Y13 that is nice.

Well .. to check if you are S-Off just boot your bootloader (power button + volume down button for some seconds or from adb command "adb reboot bootloader"). Now you will see a lot of things che if you see something that is "S-Off" or "On". If you are S-Off you can skip my next step. if you are S-On you need to achieve S-Off in order to change the CID.

The is well described in this OP, just follow the steps and you will be fine : http://xdaforums.com/showthread.php?t=2314582

Once you did this you can procede as follows..but first check in your bootloader if it is under "locked" or "relocked" state. If it is "unlocked" just lock it as explained in the previous S-Off Revone guide (the command should be "./revone -l"

So.. now you have to flash the most recent RUU. You can find a nice list of RUU at the following OP (http://xdaforums.com/showthread.php?p=39588860). The One who is compatible for sure with your actual HTC__001 CID is this one (http://bugsylawson.com/files/file/1...13323127-1031113105-release-310878-signedexe/). Just download it from the mirror and then run the executable on your PC following the wizard instructions. This will take about 10 minutes and I recommend you to have 30% or more battery. This will also wipe everything on your phone so make a backup on your PC or cloud services in order to restore your personal data.

Boot your phone, check for updates and the install 1.29 OTA firmware update. You can skip next step, but I recommend you to follow it in order to get the possibility to get your root permissions again in an easier way. Using your friend Revone you can unlock again the bootloader without using HTCDev method just using "./revone -u" command as explained on the Revone OP. I suggest doing this at this step because Revone atm doesn't work with 4.2.2 updated devices.

Now it's time to get rid of HTC_001 (at least just to receive the 4.2.2 OTA right now..

Boot your bootloader and go to fastboot mode. Then from your Terminal (cmd on windows) just type "fastboot oem writecid HTC__Y13" and press enter. Rebooting the bootloader will let you see that you did it. Bott you device now and check for updates. Your phone should find a small bug fix update, let it install that. When it's done check again for updates and you should find the 4.2.2 one ready to go (400 Mb OTA update).

Enjoy! :D

Optional : You can go to your old CID just using the command "fastboot oem writecid HTC__001" if you want and you can also get SU permissions installing a Custom Recovery and flashing SU through it (e.g. http://xdaforums.com/showthread.php?t=2173863).

remember that you need the stock recovery in order to get future OTA updates so if you root your device, remember to flash stock recovery again. You can find it here http://xdaforums.com/showthread.php?t=2224752