I have a bizarre problem. My 2016 C7 has the RMC system and I connect my iPhone to it via bluetooth. When I stream audio from Spotify or any other app, it sounds great. I would say it sounds "HD" quality, if that makes sense.
If I'm on a phone call, however, it's not clear and crisp at all, it's like a traditional old-fashioned phone call. The same goes whether I'm calling via phone or e.g. WhatsApp. No amount of unpairing/pairing or fiddling with the settings seems to solve this.
Is this just a fact of RMC MMIs? It's really bad.