I am a millennial and to be honest, I don’t really know how voice mail works or I deactivated it years ago. I don’t like calling very much, but if I get called I am sure it is something official and I usually answer it. Of course not if it is an international number. I very much prefer E-Mail, but I don’t think every millennial doesn’t phone. I don’t want to generalize for a whole group though, so it might be I am an exemption.