When I call or text, I want the app to know that I am calling from the set default number especially if there is only one, so I don't have to select it manually every single time. (Why does the UI even need to ask for the number, when we only have one? Default to the number if you only have one, and if there are multiple, allow one to select a default) Plus, the UX affordance on the phone app seems to visually suggest that you can click on the down arrow to select the number, but instead, you have to select a text, which doesn't even have a visual cue. (I'd say that's a UI/UX bug, not really a functional one)