How to fix Zenfone 5 "no sound" when calling after update 2.22.40.53

this annoying trouble caused by Zenfone 5 latest system update 2.22.40.53. ASUS team are actively working for fix. for temporary way you can follow this step to fix this issue:

1. Turn on Dial pad touch tones (settings>sound) if doesnt work,
2. When accept incoming call press "hold" button once (upper right of 9 buttons)  
3. Then immediatelly press it again, and then you can successfully talk on your phone

This issue only happens on the incoming call