I've got a iPhone 12. I thought I use to be able to text when just bluetooth paired with sync3, seems now it will read the text, and only allow certain canned responses. When it's plugged in, I can listen and respond as intended. Any ideas what setting I have buggered up?

 

Yes, you can listen, and you can respond, and do verbal responses.

 

When you're Bluetooth only, to dictate a response you'll need to use Siri. Press and hold the talk button down for ~2 seconds to get to it. Else, you're limited to the canned replies.