An old feature request I made a while ago lists the following official reply:
Thank you for the suggestion; it’s noted, but at the moment we don’t have concrete plans in doing so.
If you wish to pursue this further in 2019, I can suggest creating a feature request in the bugtracker for Android 7, as I suspect the Android 6 bugtracker containing my original feature request will not receive any further attention. Also: considering the long list of regressions introduced with the Android 7 release, I don’t expect such a feature request to be a high priority issue any time soon.
See also this closed topic: “Unlock LTE band 1 and 38?”