I have had my Sony Xperia Z3v for over a year. Just yesterday the audio on my phone started not working. I cannot hear ringing when I call someone. Also, I cannot hear anyone talking on the other end unless I use the speaker phone. I have tried all suggestions on every troubleshooting website, with no results. Any new suggestions?
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I know it sounds silly but you may have unknowingly hit the vol down button while in a call. This would only affect the vol while in a call. Maybe try making a call and turning the vol up.