excluding voice and SMS (therefore excluding real phone function) from norton family monitoring

i have used family for more than 6 months now with good satisfaction on muliple devices.

 

My son acquired a smarthphone therefore i added norton family on this device. Unlike a tablet, a smartphone should have a different policy for control because:

-i want to keep the standard rules (parental control, time of use, hours of use etc.) for the internet/data part

-but of course i want to EXCLUDE the phone function (means: voice and SMS) from this control. I wan to allow my son to place/receive calls ans SMS at any time and no restrictions.

 

I have not found how to do this. Any solution please help