Travel Pass Costs

Hi I am traveling to France and Italy and I enabled global travel pass. My question is once I leave the US, is my family (living in the US) able to call and text me? Would they get charged for calling or texting me while I’m in France/italy? What about if they FaceTimed me? Is it cheaper for me to call them? I thought since it’s still a US number they wouldn’t get charged to call me.