Chosen Solution

My iphone 6s dropped and screen glass broke. After glass replacement, my mic on handsfree is acting wierd.

  1. When on handsfree, the voice does not get through (and voice echoes) when I make an internet call (on Whatsapp, Skype, Viber, facebook Messenger etc).
  2. At the same time when on handsfree it works fine with Siri, Voice memo, camera recording and phone call. I did an experiment with front and back camera recordings. The sound is perfect. My iOS version is 10.2.1 which I think is latest. Please advise me the solution. Thanks Sarfraz

Front camera microphone is not aligned properly or the filters for the screen are blocking it. Or at worst the front microphone flex connecting to the front camera flex has been damaged. If you got it repaired from someone take it back to them and say the front microphone was working before but after you fixed it stopped working when I got it back.