Why can't I hear anything at all on my IPhone 4S?

The only thing I can hear are the clicks of when I'm typing, and when I go to the settings and try to raise the volume, I can't hear anything from any of my apps and it's not on vibrate/silent I've checked everything. Is there a way I can fix this? I tried plugging in my head phones in but it still doesn't make any sound.

Did you turn off sound effect in the app setting?

Have you checked your ears?

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