I have a Samsung Note 9 with T-mobile service. I have been using on a Ford Sync 3 for over 2 years without issue. After a recent mandatory update, Android Auto will not work. I have tried numerous remedies including a full factory reset. Seeing statements from other users, this is not an isolated issue. Android Auto with Google Maps is the only navigation app supported for my factory radio. Unless Android Auto updates their app, I am without in dash nav and I can only give the app 1 star.