microphone is not working proprely on iphone 6

Hello berco06,

you are probably dealing with a hardware fault of your microphone. If you are using some kind of case, try to pull out your phone from case and call somebody to see if it is the problem solved. Then chcek if the area where is microphone is cleared (next to the 3,5mm headphone jack). If your problem still presist, your microphone is damaged and you probably need to replace your microphone. You can do so at Apple Store or Premium Resseler (based on your location).

If the answer below doesn't work then try a phone reboot, by preddon and holding the home button and lock button until the screen goes blank and the apple logo comes up. I had a similar thing a few months ago and this fixed it.