Allow Portal Users to log in using their mobile number.

Allow Portal Users to log in using their mobile number.

I want to allow portal users to log in using their mobile number. I referred to below documentation, but it mentions that this is only supported for Indian mobile numbers. Is it possible to enable login using a Singapore mobile number?

https://help.zoho.com/portal/en/kb/creator/developer-guide/operations/sms-management/articles/sms-management#1_What_Does_This_Page_Cover