Upgraded to 16.3. I confirmed all settings were correct and the phone's volume was at max. Nothing changed. This may be a CarPlay issue. Using CarPlay, if I turn the radio up to where Siri can be heard, the music is deafening. I happened to receive a telephone call while testing. The person's voice was significantly louder than the radio and way too loud with the phone volume at max. Playing music with iTunes, everything seemed to work fine. Listening to iTunes while driving is not something I do, so this is still a significant issue for me. Guess I'll have to wait for 16.x.