Hi, I have redmi 1s, with last miui v5 stable rom 45. I connect the redmi1s on car radio sony using blutooth, connection is ok, music play well in the car. When I receive or make a call the sound is very bad, imposible to understand caller and caller undestand me. Before it was all good with my galaxyS1. That's very unpleasant, I like this phone but I need use it in my car. Do you know an issue ?