Default Does flashing this ROM remove Region Locking

I'm trying to help a friend out. He bought the SM-G900H region locked to the US and had his brother bring it overseas with him without using the phone for 5:00 of talk time to unlock the region. I've rooted the phone, flashed CWM Recovery and I'm curious if replacing the stock ROM will remove the region locking or if I'm just wasting my time bc the ROM doesn't touch that. Thoughts?
Samsung Nexus 4 (Android OS KitKat)
ROM: Latest CyanogenMod Nightly
Accessories: Plantronics Voyager Pro HD | Klipsch iMAGE S4a Earbuds