Hi Joseph,
I have tried all of the above with the exception of using a certified cable. I have one on order and will advise if this makes a difference. The car system is fully updated (confirmed by my Hyundai dealer yesterday) and I am running the latest version of ios on my phone.
I have done some additional testing today to try and identify if CarPlay is causing the issue. I have made a call using a Bluetooth connection only i.e. the phone is not connected to the cars USB socket and CarPlay not activated. The call quality to my test subject was instantly better. No cutting out and no feedback.
I plugged the phone into the car USB socket during the call (there is only one on the Tucson) and the quality issues returned. I was able to replicate this by plugging and unplugging the cable and the quality dipped when connected to the USB/CarPlay activated. I even made separate calls to rule out the plugging in and out.
To identify if it was a problem with the car media system or CarPlay, I disabled CarPlay in the menu settings and repeated the above test. The call quality was good with the phone both plugged in and removed from the car USB socket. The quality issue returned when I reactivated CarPlay.
Obviously I need to repeat this with a certified cable, but using different cables hasn't altered the poor quality calls which suggests that CarPlay is the likely cause.
Regards
Darren
