Why is the microphone not working during calls? It works in speaker.

Microphone does not work in call mode. You can hear the other person but they can barely hear you like your miles away, however in speaker mode everything is great. Tried everything, cleaning mic port, factory reset, disabling google voice, Bixby voice, etc. I suspect its only the top microphone not working since if I try voice recorder, i can hear clearly from bottom microphone.