Phone calls - people don't hear me

[AC Question]

When i make a phone call on my S6 the person cannot hear my voice. How do i fix this problem?

 

[B. Diddy]

Welcome to Android Central! Can they hear you on speakerphone, or with wired or Bluetooth headsets? If so, then the primary mic is either blocked or faulty. Check the mic opening and make sure it isn't clogged or blocked by anything.