Need to revert to stock Rom. topic

Hi, I have a HOX thats rooted and has Cyanogenmod on it, Android Version 4.4.4.
Its been fine, but now i need to network unlock it, and the code i got given doesnt work...
I know that a sense rom is required for it to work, but i cant seem to install any other roms, or downgrade. And RUUs dont work.

Now, i have another identical phone, but the difference is its pure stock.
Im wondering if i could unlock the bootloader and get CWM onto it to take a backup and transfer it to the modded phone, and restore the backup to then input the unlock code.
After, i could just restore a backup from the modded phone to get everything back to how it was.

Now, i want to know if this will work.
Will restoring a backup from another phone work? And when i do put the rom back on, will restoring the backup revert the network unlock or do i have to re-install everything manually?

Thanks in advance. And if you do need any other info like the CID or bootloader info, do ask and i shall give you what you need.

That's right, I'm the premium potaytoman and i seek the TROOOOOF! Problem? :eek: