2016 MDX thi IPhone 8 plus and os 11.2.6 when pared to car and call comes in, no mater what the phone setting is, the ring and volumn is over the top HIGH.. adjusting the phonef doesn't work and I shouldn'thave to adjust the radio that is playing to be softer. had car since 2006 and lots of iphones during that time, never had this issue.

 

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