My headphone has a built-in mic and has only 1 jack, either the mic doesn't work or i can't hear sound. please help!

Swaggy Troll

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Mar 15, 2015
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i have a Denver BTH-203, i use the jack for the computer and without jack for phone. on PC i cant find a way to use both mic and hear sound/music. i am not sure if it's called jack or cord on the microphone but i think someone will understand.
 
Does the jack look like
MUYHSMFF.C.jpg

(4 pin).
or
iphone-2g-3g-3-pin-handsfree-port-to-regular-3-5mm-earphone-headphone-jack-converter-adapter-21225_3.jpg

(3 pin) ?