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How to replace a phone used for Duo two-step authentication.
How to confirm you are enrolled in Duo two-step login.
How to remove or replace a hardware token.
Duo hardware tokens are a good option if you don't have a smartphone, or if you need a second Duo device.
How to reactivate your phone for Duo.
Using Duo with a mobile device is the recommended option.
Troubleshoot problems installing the Duo Mobile app.
How to add, remove, reactivate or deactivate Duo devices.
Troubleshoot Duo hardware token display.
How to use Duo with an offline cell phone.
How to use the Duo 12-hour "remember me" feature.
Troubleshoot common Duo login issues.
How to get a temporary Duo code ahead of time.
What do to if you forgot your Duo device.