If you reset your phone to factory settings or replaced it with a new mobile phone but kept the same phone number, you may need to reactivate Duo Mobile. For example, your iOS device might ask you to Reconnect. Tap Reconnect, then follow these instructions.
Step 1 - Authenticate
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Log in to the My Cal Poly
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Click the Personal Info tab. Under Personal Info, select Authorized Devices. Open the Multi-factor Authentication
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dropdown. Click Edit.
 Image AddedClick Other options.  Image AddedYou’ll be prompted to authenticate now, but do not respond to the prompt. Wait until Step 6 to authenticate instead. Select Manage devices. This tab is located at the bottom of the list.  Image AddedChoose the phone number you wish to reactivate from the dropdown list, then select an authentication method. Complete the verification on your currently enrolled device.  Image AddedOnce authenticated, you will
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see a page that lists your devices in square cells.  Image Added
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Step 2 - Reactivate
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Click I have a new phone (continued from Step 1 above).  Image AddedClick the Get started button.  Image AddedComplete the re-enrollment by inputting your information following the instructions in the corresponding prompts. See details in Step 3 below…
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Step 3 - Install Duo Mobile App & Add Device
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Download the Duo Mobile app from the App Store or Google Play on your mobile device. Click Next.  Image AddedOn your mobile phone,
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tap the Add button at the top right of the screen
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 Image AddedTap Use QR code. You may need to allow access to the camera on your phone.
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 Image AddedUsing the Duo app's camera preview screen displayed on your phone, point your phone at the QR code on your computer screen to complete the activation.
When done successfully, the QR Code will become grayed out with a green check.  Image AddedClick Continue to complete the process.
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 Image AddedOn your phone, name the account and tap Save. Your account is now linked. Click Practice now to learn how to use Duo and follow the prompts. When asked, tap the
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blue Allow notifications button to receive notifications, then the Ok button.
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