Today I am working with my free Azure trial version to setup a MFA server.
However, I am forced to abandon the trial/test because it requires on US phone number.

Initially I thought I'm looking at some wrong settings but No, later I got confirmation from MS representative over the chat support that I am looking at correct settings but there is limitation by Azure ! ☹

The caller ID number should show where the call is coming from in this case.
Unfortunately, now it only accepts US numbers.
This means From India we cannot use MFA , I must have a US number to get activated MFA!

See attached Snap.