While I was listening to music, the phone suddenly stopped playing through the cans (Sony MDR-ZX310AP), and through the speakers.
I used the headphones with my laptop and 3DS, and everything worked properly; sound came through the headphones.
I then tried using other headphones and earbuds with my phone, and again - everything worked properly. I also cleaned the headphone socket, but to no avail.
I can't really tell what's the issue is here. Both devices seem to work fine, just not with each other.
