How to fix my sound on iPhone4?

I have an iPhone 4 and it will let me hear my ringtone and message tone but not YouTube or pandora it says I have somethinged locked at the top of my screen next to wear it tell me my battery if I did lock my sounds how can I unlock it? I really need the help please!

You should jailbreak your phone, you can fix all this by jailbreaking your phone and downloading the latest solutions. I had similar issues and jailbroke my phone using iphonunlocker.com, and worked like a charm.