My 4S jack receptor doesn't seem to have a good tight spring connector inside.. When I first tried using the iPod function on a walk with my dog, it kept pausing, you had to play with the jack and get it 'just so' for it to play through the earbuds.. In the course of a 45 minute walk, I had this issue about 8 times. Yes, I have a case, and no, that isn't the problem.. The earbuds are Apple earbuds with the microphone. Any ideas? Anyone?