LG G2 D802 mic problem!! Need help topic

Hello everyone, my lg g2 have a problem with mic during a call an recording videos. When i am in a call everything works fine. When i put it on speakerphone my mic don't work. When i was recording a.video today nothing.can be heard i try with an other shoot and i was useing audio zoon and everything works fine. Means that non of mic is broken.. i thinks is a sofwere problem.. anybody face that problem before and fix it?? Thanx

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