What is downloaded music on your phone?

What is downloaded music and why do I need a song in my music library for the CarPro to work?

The CoolStream CarPro is equipped with sophisticated software that communicates with your AMI/MMI cables.  In order to successfully connect your phone to your stereo system, this software needs to see at least one song you have purchased and saved it to the music library on your phone.Continue reading: What is downloaded music on your phone?