The microphone icon switching constantly to headphone

Please help me everyone, as subject, when I place a call the mic icon on the left corner constantly switching to headphone icon, the volume icon on the right hand side also goes unstable and there was a weird sound when I place a call not like a normal tone. I'm really confused with the issue since I never use a headphone recently.

Big thanks for the enlightenment.

Cheers,

I'd suggest taking all of it to the store where you got your phone and asking them about it. Maybe you're doing something wrong or maybe the phone needs repair.