Chosen Solution

I ring one of my friends on my Samdung S III and I can hear them very well however they struggle to catch a word I say to them.. I take a lot of calls and I call a lot of people but im struggling to tell them something without them saying “what?” Or “speak up, I can barely hear you!”. Please help me…

Your microphone port is probably plugged with lint. Check for a small hole in the bottom of the frame somewhere near the charge port and see if it looks like there is something inside it. Can they hear you if you put the phone on speaker?

Yes when I call I hear but other not hear me not on spealer when I on spealer

mouth piece have a problem

the mouth piece is probably damaged. try taking it a samsung store to take a look at it