I had a galaxy note 9. Connected to my 2021 Honda CR-V no issues. I got a new phone 2 weeks ago, a galaxy s21 ultra. Android auto will not work. When I plug in cord to connect I get error message saying "not supported" and that is using cord phone came with. Also tried 2 other high data transfer rate cords. Have tried everything Google, Samsung, and Verizon have had me try no no avail. My phone is worthless without android auto. And contacting you again google has done nothing to solve this.