For no apparent reason, case manufacturers (for intstance, Otter and Cygnett for the S4) make the holes for headphones far too small, even though some third party  headphones, particularly the earbuds, have thicker heads holding the plugs. They can't fit into the now-recessed port. The only solutions--a different case (no easy task, especially if you have your heart set on a particular one); new, pricey headphones;  alteration of the case if you dare...or, best of all, THIS. It is an inexpensive solution. It is a standard plug with a female outlet for your headphone plug and a standard headphone plug to fit into the typically small case opening. It's a shame it tends to be advertised for iPhone, as the problem is similar for these cases with many Android phones. Hope you found it!