My wife just wants normal voicemail like she's had for years.
I'd like to switch it per device, but if that's not possible I'll just disable it for all lines.
Just dialing *VM isn't enough. When she hit the VM icon in the dialer/on the home screen it should dial not start the Visual VM app.
I don't use the carrier VM (GV instead for the free transcripts and PC access) but she does.