iPhone 12 can’t speak on phone calls

Hello I was just wondering how to fix my iPhone 12 max not working for phone calls. When I get a call or call other people they can’t hear me. They can only hear me when I go on speaker phone. Last night I turned off noise canceling setting and it started working and today it just doesn’t make a sound. It only works when I’m on speaker phone. I don’t think the microphone is broken because I’m able to use voice memo with no problem. And this phone is brand new. Not even a week old.