Antwoord op "Asus ZenFone 5 Bottom microphone not working"I have same problem with Asus Zenfone 6. What I did is I uninstalled the Asus Digital Clock & widget apps in Google Play store. After that I did testing again, and the problem solved. In my case, Chiranjib Sarma is correct. No hardware issue. It just a bug in Asus Clock apps. Try uninstalled (remove the last update) and test again. Hope that helps.