Music and sound has stopped on all my apps on iPhone 4?

My iPhone has been working fine. But recently I have lost all sound on every single app. I've checked the settings on each app and sound is switched on for each of them. My ringtones and everything else still work.

Try to update to ios 6.1 and go from there.
If that doesn't work please put some additional info under your original question and ild be happy to help further

Hope this helps

Might be somthing related with this http://www.unseenapps.com/?hop=yanleman

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