I tried searching for such a thread, but couldn't find it... Anyway, i'm having trouble with my headphone jack on my 3GS. It was working fine just yesterday, but for some reason, it is now only playing music/sound on the Right headphone only. Anyone have any idea what it can be? So far, I have tried blowing air into the headphone jack in hopes of removing any dust, and also knocking it slightly on its side. Knocking it multiple times on its side fixes the problem for a while, but then the left headphone slowly starts fading and its right only after a while. Any thoughts/solutions?