This seems to be a very basic concept. If my wife texts, or emails me I would like to have a distinct sound played for this notification. If my front door camera text or emails me I would like to have a distinct sound for it. I can not find a way to do this. In all my searches it would appear this used to be possible early on but has been disabled or omitted from current phones. Why did they do this. This seems like a very handy thing to have.