Just yesterday I got a Samsung Galaxy S6. I had Spotify up ready to go and plugged my wireless FM transmitter jack into its headphone port in my car, but the music was playing through the phone speakers and not through my car stereo. Tried with both transmitters I had, made sure both were on the correct radio station and that all jacks were connected snug. I didn't have this problem with my previous phone which was a Nokia Lumia 920, doing the exact same things listed above. Is the Galaxy S6 lacking a feature that is needed for my wireless FM transmitter to work?