6.0 - Last modified on 2026-05-06 Revised by Annie Zhang
5.0 - Last modified on 2026-04-22 Revised by Annie Zhang
4.0 - Last modified on 2026-04-22 Revised by Madelyn Fukuda
3.0 - Last modified on 2026-04-22 Revised by Natasha Batra
2.0 - Last modified on 2026-04-22 Revised by Luca Giles
1.0 - Created on 2022-01-10 Authored by Luca Giles
Q: I had Duo Mobile set up on my smartphone already, but it is no longer working. What can I do?
A: In order to fix this issue, please re-enroll your device. Ensure you have backup passcodes ready, and then delete the Duo application from your phone. Reinstall it as a new device – instructions are on our website.