I first got the DX2 5 moths ago. The jack was fine for a week or two, then began progressively getting worse- any movement of the plug at all would cut the sound off or switch it to the droid's speaker instead of the headphones, or even worse, automatically dial phone numbers. I finally got a replacement DX2 about a month ago. Same deal. It was great at first, then starts acting up. Can't run with it because it will not stay on. Driving me crazy. With this one exception, I love this phone. But this is a major problem. Wish I'd gotten something else.