How do I activate Duo Mobile on my phone (Student)?

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PLEASE READ: Duo SMS is no longer an option for Students as of Feb 6, 2025. If you are no longer getting the text message option/Duo is asking for a bypass code and you are a current or incoming student, please follow the steps below to set up the Duo Mobile app. To install the duo mobile app, your phone must have iOS version 15 or higher or Android version 11 or higher.

Students (current, incoming)

Please choose from the following scenarios:

1. I have the same phone number, my ID or know my proxy number, and can use DuoSOS

2. I have a different phone number, my ID or know my proxy number, and can use DuoSOS

3. I do not have an ID or know my proxy number

Reactivate with the same phone number using Duo SOS - Students Only

Download and install the Duo Mobile app from your device app store if you do not already have Duo Mobile installed.
Open a browser and go to a page like my.bucknell.edu or mail.bucknell.edu. You'll be prompted for your username and password.
- If you're already logged in to one of these services, switch to a different browser (Edge, Chrome, Safari, Firefox) or use an incognito/private browser.
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, password, date of birth, and BUID. 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 more quickly.
Once verified, you will see a list of devices on your Duo account. Select I have a new phone under the device phone number you need to reactivate or select Add a Device.
Note: Device type (Android, iPhone, etc.) will update after you reactivate your new smartphone.
Select Get started on the "Let's set up your phone" screen
Select Send me a passcode to confirm ownership of the smartphone
Enter the passcode texted to your device and select Verify
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.

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.
Open a browser and go to a page like my.bucknell.edu or mail.bucknell.edu. You'll be prompted for your username and password.
- If you're already logged in to one of these services, switch to a different browser (Edge, Chrome, Safari, Firefox) or use an incognito/private browser.
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.

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 set up the Duo Mobile App.

If you started this process using a mobile device to do the first set of steps continue with the steps below

Select Continue
Save the account
Congratulations! You have successfully set up the Duo Mobile App.

I don't have a BUID or know my proxy number

Please submit a Tech Ticket. Provide a description of the problem and provide a mobile number. A staff member will follow up.