My iPhone 12 will not connect reliably via Bluetooth to my 2011 Volvo S80. I have been through countless routines of adding the phone, deleting the phone, powering off the phone, powering off the car, adding the phone from the car, adding from the phone, etc. NONE of these alternatives gives me a reliable Bluetooth connection! Once in a while I can answer a phone from the car and then 5 minutes later I can't answer from the car. Usually both the phone and the car show it is connected, but it will NOT work. I recently upgraded to the iPhone 12 from an iPhone XS, both are running the latest software updates from Apple. Bluetooth is supposed to be backward compatible, but the iPhone doesn't seem to follow that rule! I'm not buying a new Volvo, but I may decide to either take my new iPhone back to AT&T or switch to Android. (One other note - and maybe this will help Apple software development - my iPhone 12 DOES connect reliably to my 2016 Volvo S80!)