Please tell us some basic information before asking for help:
Model Name: Asus ZenFone 7 Pro
Firmware Version: WW_22.214.171.124
Rooted or not: not
Frequency of Occurrence: always
APP Name & APP Version (If your issue relates to the app):
In addition to information above, please also provide as much details as you can, e.g., using scenario, what troubleshooting you've already done, screenshot, etc.
I'd like to say again that VoLTE is an essential feature of a modern (former "flagship") mobile phone and I'm not the only one who misses this on my ZenFone.
Please consider to implement this feature soon in one of the next updates.
This would make many users very happy.
Yours faithfully (with a little hope)