My iPhone doesn't even work in my car says "Device is unsupported" yet my friends iPhone which is the same model works. It worked for a good 7 years then just d

My iPhone doesn't even work in my car says "Device is unsupported" yet my friends iPhone which is the same model works. It worked for a good 7 years then just deviced to stop any of my devices. Aux works, but its not the same. But my friends iPhone works, I have no idea why.