Speaker
I have an iPhone 7 Plus and when I plug my phone in to the car through the Aix lead it only plays through the left speaker. I saw that a few others had this problem and was told to make sure mono audio wasn’t on and switch the the slide to the middle of left and right. However, I have done this and there is no difference, it still only plays through the left side of my car.
iPhone 7 Plus, iOS 12