I have had a galaxy s4 for a while, love it compared to my iphone 4s. I do have a very annoying problem, when I play music while my phone is locked it pops alot and makes other weird noises. This is not the same problem that most people had with the headphones and frequencies.. anyway it happens with any headphones. I have restarted my phone up to 5 times and still it doesn't work. As I said, only when my phone is locked. If I am at the home screen scrolling down the playlist it still works fine.