Use the following instructions if you have switched to a new phone with your existing phone number or if you have factory reset your phone.
- Install the Duo Mobile app from the app store on your phone.
- Log into My ASU
- Go to Profile > Account Details > Password & Security > Two-Factor Auth Device Management.
- Authenticate using either the Call Me or Enter a Passcode option.
- Once authenticated, you will see your previously enrolled device or devices listed including your phone. Click the Device Options button shown for your phone.
Please note: In the image below, there is only one device enrolled.
![Device Options Screen](/kb/servlet/rtaImage?eid=ka16T000001Eu9f&feoid=00Nd0000007RZQE&refid=0EM0W000001HC4h)
6. As shown in the image below, click the Reactivate Duo Mobile button.
![Duo screen with option to reactivate duo mobile highlighted](/kb/servlet/rtaImage?eid=ka16T000001Eu9f&feoid=00Nd0000007RZQE&refid=0EM0W000001HC4m)
7. Select the type of Device.
![Device type selection screen](/kb/servlet/rtaImage?eid=ka16T000001Eu9f&feoid=00Nd0000007RZQE&refid=0EM0W000001HC4r)
8. Click the I have Duo Mobile installed button.
![I have duo installed option](/kb/servlet/rtaImage?eid=ka16T000001Eu9f&feoid=00Nd0000007RZQE&refid=0EM0W000001HC4w)
9. Follow the onscreen instructions to reactivate Duo either using the QR code or by having an activation link email to you (click that link if desired).
![QR Code for activation](/kb/servlet/rtaImage?eid=ka16T000001Eu9f&feoid=00Nd0000007RZQE&refid=0EM0W000001HC51)