Caller or Receiver can't hear my voice in Moto G 2nd Gen 2014 running Lollipop

The Caller or Receiver can't hear my voice but I can hear them. It seems to be a kind of software bug because when I do some recording the mic works perfectly. The only problem that I noticed is my voice is not getting through on the phone calls. I checked the microphone sign in the dialer mode, and it is not disabled too. I have all my contacts and important messages, and I simply don't want to do the factory reset, unless it is really required and is helpful too. I'll appreciate any help.