> Easy enough to do. I think the biggest single culprit is cumulative damage from sitting down or walking with my phone in my pocket with headphones plugged in.

> Easy enough to do. I think the biggest single culprit is cumulative damage from sitting down or walking with my phone in my pocket with headphones plugged in. Second biggest one is catching the cable on stationary objects. Doorknobs, shelves, armrests on office chairs. I've done quite a lot of everything in that list. Thousands of hours of walking, cycling and other activities, I've caught it on door knobs and other things very violently. I've never had an issue with the jack breaking though, on phones, MP3 players, walkmans or my PC (I've tripped over the cord a few times). I'm sure it can break, but the post I responded too said it happened with every phone they've had, which I find very doubtful.