How do I add a new phone number or secondary device to Duo?

duo new tablet prompt universal secondary

If you get a new phone, but you're keeping the same phone number, it's easy to re-activate Duo Mobile by following these steps.

If you get a new phone number or want to add a tablet, iPad, etc., however, the process is a little different. For example, a student studying abroad might get a new phone with a different SIM card or a Bucknell employee might want to add a new phone number to provide a different option for authentication.

Before you start

Log into a service that requires Duo like myBucknell or Bmail. Enter your Bucknell Credentials.
Stop at the duo screen and continue What form of authentication do you plan to use?
Current students, faculty, and staff should update B-Alert if your phone number changes.

What form of authentication (used to verify identity) do you plan to use?

Click on the situation below that applies to how you will authenticate during the setup process. This step is required and most people can complete these steps without IT intervention. We have many ways to authenticate whether you need to reactivate duo or just gain one-time access to a Bucknell internal page or system. For more information check out this Duo Security FAQ article.

1. I have a new phone number and can use Duo SOS (Students Only) - Bucknell ID Required

2. I have a new phone number and I have a code generator

3. I have no access to one of the authentication methods

Activate a new number or additional device to Duo using Duo SOS Bypass Code

Download and install the Duo Mobile app from your device app store if you do not already have Duo Mobile installed.
Switch to your computer.
Log into a service that requires Duo like myBucknell or Bmail. Enter your Bucknell Credentials. If you're already logged in to one of these services, switch to a different browser (Edge, Chrome, Safari, Firefox).
When Duo tries to authenticate, select Other Options
Select Manage Devices
In a new tab, Go to duosos.bucknell.edu
Log in with your Bucknell Username and password. Note: you will need your Bucknell ID to get a code.
Copy the code and go back to the Duo Security tab/screen
You will need to verify yourself. Select Bypass code.
Paste the Duo SOS Bypass code in the bypass code field box and select Verify.
- If you were not approved, you may have taken too long between getting the Duo SOS Bypass code and entering it in the field below. Go back to step 5 and try again.
Once verified, you will see a list of devices on your Duo account. Select Add a device.
Select Duo Mobile
Enter your new phone number in the Phone number field
- Tablet/iPad: Select I have a tablet at the bottom of the screen
Verify your number is correct and select Yes, it's correct
Download the Duo Mobile App and select Next
The next step will vary depending on what device you started the reactivation process on.
- Computer: If using a computer, click here to go to the next set of directions.
- Mobile: If using a mobile device, click here to go to the next set of directions.
If you are a student, faculty, or staff member, please update your phone number in B-Alert to receive important campus notices.

Activate a new number to Duo using a Code Generator

Download and install the Duo Mobile app from your device app store, if you do not already have Duo Mobile installed.
Switch to your computer. Go to this web page: https://buapps.bucknell.edu/script/duosecurity/
When Duo tries to authenticate, select Other Options
Select Manage Devices
You will need to verify yourself. Select Hardware Token
Enter the code from your code generator in the passcode field box. If you use a yubikey, it will auto-generate the passcode when you put your finger on the "Y".
Once verified, you will see a list of devices on your Duo account. Select Add a device.
Select Duo Mobile
Enter your new phone number in the Phone number field
- Tablet/iPad: Select I have a tablet at the bottom of the screen
Verify your number is correct and select Yes, it's correct
Download the Duo Mobile App and select Next
The next step will vary depending on what device you started the reactivation process on.
- Computer: If using a computer, click here to go to the next set of directions.
- Mobile: If using a mobile device, click here to go to the next set of directions.

No access to one of the authentication methods

If you're in Lewisburg, you can come to the Tech Desk with your photo ID and a staff person can help you add another number, or provide you an alternative source of authentication, like a code generator.
If you're not in Lewisburg, and you're a student, you can go to https://duosos.bucknell.edu and get a temporary access code. You can then copy that code, and in the screen above, when you're asked to verify that it is you when you're adding a new device, you can click on Enter a Passcode. Paste in the code that you've copied, then add a new phone number or other device.
If you are not a student and are not located in Lewisburg, please call the Tech Desk.

Add your Account to Duo Mobile App

The next step will vary depending on what device you started the reactivation process on.

Computer: If using a computer, click here to go to the next set of directions.
Mobile: If using a mobile device, click here to go to the next set of directions.

If you started this process using a computer to do the first 10 steps continue with the steps below

Switch to your smartphone.
On your smartphone, open your Duo Mobile App (enable camera if asked).
- If you do not have an account listed click on Add Account (+)
Click on Use QR code
Go back to your computer and hold your smartphone up to the screen to scan the QR code.
When the QR code is successfully scanned you will see an account pop up in Duo Mobile. Save the account.
Congratulations! You have successfully reauthenticated Duo.