Chosen Solution
i can not figure this out. The sound work ok during the call, i can press the volume button and the it show volume going up and down. I can heard sound during the call. sound also works find with voice recorder. But when it comes to games apps, no sound. When I press the volume button, nothing happens. Please help. thanks
Maybe a glitch or your rocker switch is set to mute. For the glitch if it may be the problem just do a soft reset by holding the home and power button till you see the apple logo come up as if the device is being powered on.
Double click home button and slide to the right and see if it is muted there.