How do I use my headphone warranty?

Hi

Apple accessories are covered by Apple's Limited Warranty against defects in materials and workmanship, but not against accidental damage or misuse.

Follow the instructions here:

If your headphones don't work with your iPhone, iPad, or iPod touch - Apple Support

If the issue persists, contact Apple Support, make a Genius Bar reservation or visit an Apple Authorised Service Provider with a view to having your headphones checked and, if eligible, replaced under warranty:

• Contact - Official Apple Support
• https://twitter.com/applesupport
• http://www.apple.com/retail/geniusbar/
• https://locate.apple.com

All you have to do is take the headphones to your local Apple Store, the headphones have a serial number and the genius bar should replace them if they are faulty. Make an appointment beforehand for a genius bar and you should be good!