No sound from one or both earbuds
Edited
Please check the volume on your media device and make sure it is turned up, change volume level as needed.
Does changing the media volume solve the issue?
If not, make sure the 3.5mm headphone jack is properly inserted all the way into your device. Sometimes a case or skin can prevent a proper connection, if one is being used, please remove it.
Was the jack properly connected or did removing a skin or case fix the issue?
Try the ear buds in a different media device.
Does the sound still not work with a different media device?