Headphones mic volume is too low and the caller can't hear me

[giordy89]

Please tell us some basic information before asking for help:
Model Name: Asus Zenfone Max Pro M2 (ASUS_X01BDA)
Firmware Version: PKQ1.WW_PHONE-16.2017.1908.070-20190903
Rooted or not: Not
Frequency of Occurrence: Always
APP Name & APP Version (If your issue relates to the app): All calling apps like What'sapp, Telegram, Discord etc..
When i call someone using any headphones with mic (i tried with 4 different ones), the caller can't listen my voice because the volume si very very low.
I hadn't this problem since i updated to Android 9 😅
How can i solve this? i dont want to root my phone and go back to android 8
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[nidhin3]

I think its the problem of your phones software. Try to factory reset your phone after taking a backup.

[Christine_ASUS]

Hi giordy89
Before factory reset, you could also try the tips below
1. Please try the latest firmware (WW-16.2017.2004.075) with manual update.
#Manual Update Guide
https://www.asus.com/support/FAQ/1009748/
#ZB631KL Firmware Spot
https://www.asus.com/Phone/ZenFone-Max-Pro-M2/HelpDesk_BIOS/

2. Enter "Safe Mode"
# How to enter and exit "Safe Mode"
https://www.asus.com/support/FAQ/1005163/
If headphones works well in "Safe Mode", please check on any disturbance from the installed 3rd party Apps. You may try the factory reset.