Please tell us some basic information before asking for help:
Model Name: ASUS_X01BDA
Firmware Version: PKQ1.WW_PHONE-16.2017.2005.092-20200518
Rooted or not: Not
Frequency of Occurrence: Always
APP Name & APP Version (If your issue relates to the app): Calling default App and Whatsapp calling as well
My phone is Asus Zenfone Max Pro M2. Currently running the android version 9. I'm at North India region.
The volume for calls and volume for bluetooth device are too low when connected to the phone. No updates have fixed this. I can not talk without speaker. Request you to kindly fix the same as company like ASUS should not deliver this experience.