Well, from what I have read and been told, most of that stuff should be workable with alternatives. Google Voice can be setup with call forwarding to have the equivalent of Visual VM for free, Google Duo can be used for video calls (although I don't know if or how it would work with someone who does not have Duo and only stock video calling app on phone with VZ, etc). The biggest things honestly to me are VoLTE and HD Voice, and those apparently work so that is huge. The video and VM should be available with other apps, and I assume WiFi calling as well should work with something like Signal or another WiFi based/data calling app. I will find out when I get the phone.