Lumia 920 - Controlling volume thru earphones

I bought a Lumia 920 yesterday and using it with my apple ear pods. But for some reason I'm not able to control volume through the controls in earphones. Only play/pause control works.

I tried with my other sennheiser earphones as well but the same thing, only play/pause control works.

Is this what everyone experiencing or is there some setting to allow this or it needs some different earphones?