All of a sudden my 4S is giving me issues with sound. When I try to play music there is no longer a sound bar to adjust anything and no sound. Also when I try to adjust the ringer volume on the phone the little bell shows up but there's no bar showing how loud or quiet it is either. When I brought it back to Verizon they couldn't find a problem and told me I have to bring it to an Apple store. I'm hoping to avoid that, any thoughts?