i dont get sound unless i plug in my head phones. Everything works fine except that. It doesn't have to do with headphones because it doesn't say headphones when i change the volume i think it has to do with dock connector im trying cleaning it right now but after a few rounds its not working too well. it also says that accessory error would you like to go to airplane mode or something like that. This is getting annoying and sometimes its really frequent and sometimes its not. need help