Please tell us some basic information before asking for help:
Model Name:
Firmware Version:
Rooted or not:
Frequency of Occurrence:
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.
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Why the official support site does not exist?
https://zentalk.asus.com/en/discussion/57871/220128-rog-phone-ii-zs660kl-ww-18-0210-2201-211#latest