DUO MFA app push notifications not received on phones out the United States

It has been discovered that DUO app push notification are sometimes not received on phones out the United States.

This might be due to the data plan that is applied to specific phones.

As an alternative to using the DUO App, it should still be possible to still receive texts and calls to the same phone using the following steps:

Open a new incognito window (Google Chrome) or new private window (Safari, Firefox or Edge).
Visit the desired Pomona College information resources that requires authentication, like http://mail.pomona.edu .
You should be taken to a Microsoft login page (with Stover Walk in the background). Authenticate there with your Pomona College username and password.
When you see the Check for a Duo Push prompt, click 'Other options' instead.
Choose to have DUO call or text the new number. Enter the code that you receive from the call or text.

NOTE: The same data plan problem might cause trouble with texts. Use the call instead if so.

You should now be logged into the desired Pomona College information resources.

NOTE:

If that doesn't work, please report trouble to ServiceDesk@pomona.edu .