My wife's iPhone is connected to our MYLR. We were driving and all of a sudden we get a LOUD sound that scared us both. It was her phone getting a text message. We parked at home and she went inside with the phone. I stayed in the car and while she was returning the text i can hear loudly the keys being tapped over the car speakers. I went to the speaker icon on the dash and turned it down and it turned the volume down on her phone? How do I change the volume and turn off the key stroke sounds in the MY?