Note: Enrolling in Duo for the first time is a multistep process that takes approximately 10 minutes to complete.

If you upgraded to a new phone and did not enroll a secondary device to self manage activating the new phone, see I have a new smartphone. How do I set it up for Duo?. 
Please remember to remove old devices if they are no longer in your possession. 

Consider opting into Duo Instant Restore for iPhone or Android.

Before you begin:

• Make sure you are using a compatible device:  Duo unsupported Older Phones, Operating Systems, Browsers and Security Protocols
• We recommend performing these steps during support hours (M - F, 7 a.m. - 6 p.m.).
• Make sure your smartphone is charged.
• It is strongly recommended  that iCloud Keychain (for iPhone) or app data backups (for Android) be enabled, as that will make upgrading to a new phone later much easier.
• You will need your Apple App Store or Android Play Store password to complete Step 2.
• If you are registering your smartphone as a second device, use these instructions.
• For departmental accounts if you experience difficulty enrolling using a phone number, you can try to enroll your smartphone as a tablet device using these instructions.

Part 1: Begin Duo Enrollment from Your Computer

Note: These steps must be completed on a laptop or desktop computer.

1. To begin your Duo enrollment, open your web browser to https://computingaccounts.ucdavis.edu, select the Duo Multifactor Device Manager option, and log into CAS.

2. Add Duo Mobile.

• • If you have never configured Duo before, your browser will now show the Duo Enrollment screen. Click Next, then select Duo Mobile.

• • If you have other devices configured for Duo, you will be prompted to log in.

• • If Duo push is your chosen authentication method, you may see this prompt to enter a verification code.

3. Click Add a device, then select Duo Mobile.

4. Enter your phone number, then click Continue.

If you experience difficulty enrolling using a phone number, you can try to enroll your smartphone as a tablet device using these instructions.

Part 2: Install the Duo Mobile App on Your Smartphone

1. Go to the App Store or Play Store on your smartphone.
2. Search for Duo Mobile.
3. Install the free app on your smartphone. There is no fee to install the app.

Part 3: Complete Enrollment Using Your Computer and Your Smartphone

1. After completing the installation of the app on the smartphone, click Next on the computer.
   
   
   
   
2. With the Activate Duo Mobile screen displaying on the computer, open the Duo Mobile app on the smartphone.
   
   NOTE: This is an example screenshot. A unique QR will be generated specifically for your account and device. If you are following the steps, you will have seen your unique QR code displayed.
   
   
3. Tap the Add button in the upper right corner of the phone screen and select Use QR code.
   
    
   
   
4. From the Duo Mobile app, scan the barcode that displays in the Activate Duo Mobile computer screen.
   
   
   
   
5. A green checkmark displays on the computer screen.
   
    

Part 4: Complete Enrollment Using ONLY your Smartphone (No Computer)

1. Please give us a call at (530) 754-4357 so we can assist with registering your device.  For security purposes we need to verbally verify your account information when assisting with DUO device registration.
2. If you are unable to call us, please click the link to Start a Chat Session.  We will need to verbally verify your account data over Zoom to assist you with your DUO device registration.
   
   

Ready to register a second device in Duo? See KB0003229.