Using the same phone number
If you replace your phone that was previously enrolled in Duo, but have the same phone number, there are two ways to activate Duo on your new device.
The first allows you to reactivate your new device if you have more than one device set up on your Duo account (for example, your phone and a tablet, or you're phone and a token). You can follow the instructions in this Technology Knowledge base article.
How do I reactivate Duo Security on my mobile device?
Note: This method works only if you have access to the old device or another device registered to your Duo account. If you don't have access to your old device, or it's been erased/restored, (i.e., you only have one device registered with Duo) you will need to call the Technology HelpDesk at 765-285-1517 to activate your new device.
The second method lets you make it easier to restore your Duo account to a new mobile phone, but you must set it up in advance of setting up a new device. To do so, you can use Duo Restore, a feature provided by Duo Security, that allows you to store your setup information with Duo and restore it to a new device over the internet.
This Technology Knowledge Base article has the step-by-step instructions you need to set up Duo Restore.
Backing Up and Restoring Duo Two-Factor Authentication on a Device
Using a new phone number
If you are getting a new phone number, whether or not you are replacing your mobile phone, you must re-enroll that number in Duo as if you were setting it up for the first time. See the instructions above for setting up Duo on your Device.