How to Change the Song on an iPhone Using Headphones
The headphones that come with the iPhone contain a built-in mic and remote control so you can enjoy hands-free conversation and conveniently manage iPod playback. The iPhone headphone remote control is located on the right earbud cord. Learning the proper iPod remote control gestures lets you quickly perform various playback commands, such as changing the song you are listening to.
Locate the "Center" button on the headphone controller. This button is situated between the "+" and "-" volume buttons.
Press the "Center" button twice quickly to skip to the next song.
Press the "Center" button three times quickly to go to the previous song.