Hi My 4s is causing me a slight headache, It works ok as a phone by itsself but for some reason the volume bar isn't there and thus no sound when on u tube or music or streaming radio etc. The mute button is off but I have tried this both ways and proved it works ok and Blue tooth headsets work on the phone ok, and earphones work ok volume bar appears when it should any ideas? I am running the latest software on the phone as well
