Just bought a certified 2015 RX 350. There's an echo for anyone talking to the phone in the car. I've messed with the mic volume as well as gotten into the hidden menu and changed settings. The dealer decided it was the mic and put in a new one today, which made no difference. I've seen several older posts blaming the iPhone. My wife and I use the Galaxy S7. Does anyone have a solution? I can't believe that I've got a car that was over $50K new, and my $125 JVC in my truck does Bluetooth better.