Why does my iPhone 5s have no sound when plugged into headphones?

I have tried all of my head phones and still no sound. It works fine when you take the headphones out.

Might be a problem with the headphone / 3.5mm port?

Might be the problem with Headset and also there may be some problem with your audio jack, check the both and resolve your problem and also you should also get Leo Privacy Guard in order to gain utmost security.