So interesting. I have had a few times that it works, but others that it doesn't. Very hard to diagnose. I end just throwing in airpods if the incoming call is an important work one
So the new version of IOS13 seems to have made it slightly better. Calls at low speeds (under 40) seem to work okay. When I get much faster than that, while I can hear the call clearly, anyone on the other end gets a really choppy version of me.
I’m having the exact same issues. When I’m CarPlay I can hear the other end of the line perfectly, but they hear me very sporadically. Sounds like 25% of my words cut out. I have an iPhone XSMax and have tried all manors of cables. It seems like there is some bug no one will admit to.