I use the Google music app on my Samsung and have not had any issues. I also stream Pandora and use a flash stick from time to time. Pandora and the Google music app have work just fine with my Bluetooth and the hand controls have always worked for me with both. I do have an issue with the flash drive from time to time: sometimes the hand controls will not let me move to the next song and on occasion the infotainment radio will not recgonize the flash drive.