I have stopped receiving push notifications on Duo Mobile.
You may have trouble receiving push requests if there are network issues between your phone and our service. Many phones have trouble determining whether to use the WiFi or cellular data channel when checking for push requests, and simply turning the phone to airplane mode and back to normal operating mode again often resolves these sort of issues, if there is a reliable internet connection available. Similarly, the issue may be resolved by turning off the WiFi connection on your device and using the cellular data connection.
Check the time and date on your phone and make sure they are correct. If the date and time on your phone are manually set, try changing your device's configuration to sync date and time automatically with the network.
If neither of these suggestions work, then the simplest resolution is to contact the UT Service Desk at (512) 475-9400 to request re-activation of Duo Mobile. You can log in with a passcode generated by the Duo Mobile app and send a new activation link to your phone. See the Manage Devices guide for instructions.