hi. My iphone 4S will not play music on my music app out loud, but when I plug in headphones, it works perfectly fine. I can't control my ringer with the volume buttons or the volume on the music app unless the headphones are in. My ringer works when I receive phone calls, but my text sounds do not work. I have tried blowing in the headphone jack & charging dock, cleaning it with paper, a card, a brush, a q-tip, and every other "hack" designed to fix these things, to no avail. PLEASE HELP ME I AM A BROKE COLLEGE STUDENT WHO CANNOT AFFORD A NEW PHONE!!!!!!!!!!!!