I have a similar problem as many others here. My Iphone 12 Pro Max IOS 14.4.2 does connect through bluetooth in my new car (A DS3 Crossback) and I can even make calls. But when someone calls me, I can not take the call. I get a phone symbol in the display but when I press it, it just won't connect. Switched my simcard to my old IPhone 8 with the same IOS, and I can pick calls without any problems. I even went back to where I bought the car and we tried the Iphone 12 in another similar DS car. Same problem! Then we tried in a Peugeot, and it worked. What is wrong with the Iphone 12 software when it comes to some cars?