My galaxy s4 isnt working

[blastoise]

When I have headphones in, my galaxy sometimes goes up to full volume a minute after music is playing. Also, sometimes music is stopped and S Voice speaks and says, "Please unlock the device" randomly (also with headphones)

 

[B. Diddy]

Are these standard headphones, or do they have additional remote controls, like Pause, Play, Skip Track, etc.? Are they "Designed for iPhone"? If so, then they may not be entirely compatible with Samsung devices.