MFA-Duo - I am not getting login notifications on my Android
This document will explain why you are not getting notifications from the Duo Mobile App, as well as what settings to adjust to receive notifications
Checking for login requests
Duo Push delivery issues are most often resolved by pulling down on the screen to check for notifications in the Duo Mobile app:
When you do this, the Duo Mobile application will reach out to the Duo cloud service directly to check for login requests rather than using the push notification services. This is generally the most reliable way of receiving a login request and should work if the app and account are functioning properly.
If pull to refresh works
If manually checking works, then the issue is related to the Google Cloud Messaging (GCM) push notification service and Duo Mobile registering for pushes correctly. This will often fix itself after you pull-to-refresh. Sometimes there are issues with GCM on the device, like out-of-date play services, that prevent the device from receiving push notifications properly, you should update Google Play Services if possible to alleviate this.
If it's an issue with the long-lived connection to GCM on the device, toggling Wi-Fi off and back on may fix the issue.
Clearing the Duo Mobile application cache can also resolve delivery issues.
Select Apps and scroll down to select Duo Mobile.
On the App Info page, tap Clear Cache.
If you continue to experience issues or pull to refresh does not work, consult the Duo documentation on this issue.