I have a Thl W8S which was bought with original headphones, and they worked perfectly. Now I have bought a replacement pair, original, which have the following problem. The sound volume is too low. If plugged in with no music playing I can hear a distant noise. If I keep the the button pressed the sound comes out unfettered and with normal loudness. On the other hand the button is not controlling the phone anymore, i.e. accept calls, stop the music. It is just not recognized. While I was waiting for the headphones to be delivered by mail, I was using a universal set of headphones which had exactly the same behaviour, so I used them just to listen to the music with the button sello-taped down. I hoped I'd recover all the functions of the headphones when I used the original ones, but nothing is working. Is some contact in the jack socket gone to pot?