In my experience (with the beta), live voicemail actually replaces carrier voicemail whenever possible. This means that if you ignore (or even miss!) a call,

In my experience (with the beta), live voicemail actually replaces carrier voicemail whenever possible. This means that if you ignore (or even miss!) a call, it’ll record and transcribe the call as a live voicemail anyway. So I’m not sure what Google’d call screening provides above this (unless all unknown calls get sent to the call screening? You can tell iOS to “Silence unknown callers,” which does still ringback a few times before recording a what I presume is a live voicemail) And at any point during the voicemail you can answer the phone anyway. Of course, if you get a call while you have no signal it’ll just go to carrier voicemail. (Recorded live voicemails and carrier voicemails are played back from the same screen, so this is no more complicated to navigate than before.)