Chosen Solution
My iPhone 6S Plus has always had poor sound quality when recording audio and to others when in phone calls unless the speakerphone is on. Does this require logic board and pared fingerprint sensor replacement?
Did you check the microphone filter which is located right next to the headphone jack? Maybe it just needs a little cleaning. Sounds like people can’t hear you probably which is microphone, not you can’t hear them because it’s too quiet which would be earpiece speaker filter right?
