[Q] How to lock/disable APN changes?

Hi XDA,

Is there a mod to an system apk or an sqlfile db that I could set to read-only that will either lock or disable editing of the system APN settings?

Some users have already reported on XDA in the past that their APN settings are locked, I would like to know how that can be achieved, or maybe by hex editing the settings.apk to remove the APN option.

There must be a way to do this.

Thanks