GoKawiilAndroid Auto teardown reveals option to save a default phone number per contact
A teardown of Android Auto version 18.1.164344-release.daily by Android Authority uncovered new strings indicating a 'Remember this choice' feature for contacts with multiple saved numbers. The strings also show a message confirming when a default number has been set, which users could reportedly change by selecting the contact again. Google has not confirmed the feature publicly, and it is not yet available to users.