iphone 11 - call audio routing
Since I bought the new iphone 11, it has automatically change all my phone calls incoming or outgoing to speaker mode especially when I was driving, and it was not connected to my car blue tooth. I have been trying to change it to my car bluetooth by seaching the call audio routing which was recommended in the website that I have searched but unsuccessful. please advise how to do it ?
iPhone 11, iOS 13