iPhone 12 ProMax through aux cord to 2008 auto
My partner just came to join the apple community by switching from Samsung to a new 12 ProMax. She was hoping to speak handsfree to incoming calls much the same as she did with her Android. Upon trial with a newly bought aux to lightning cable, she could not hear through the stereo speakers. Playing music through same cord works.
what might we be missing?
Is there a setting on the iPhone we need to change? I appreciate the guidance. Sincerely, Jeff