---
title: "Reactivate Duo Mobile on a New Phone"
canonical: "https://tech.calpoly.edu/space/CPKB/3211385/Reactivate%20Duo%20Mobile%20on%20a%20New%20Phone"
format: markdown
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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. 

### Step 1 - Authenticate

<details>
<summary>Click to view step 1</summary>

1. Log in to the [My Cal Poly Portal](https://myportal.calpoly.edu/).
2. Click the **Personal Info tab**. Under Personal Info, select** Authorized Devices**. Open the **Multi-factor Authentication** dropdown. Click** Edit**.

![Cal Poly Portal page with Authorized Devices outlined in red.](media://02190a6a-1617-4b6b-87af-1ee8164744f2)


3. Click **Other options**.* *
  
4. You’ll be prompted to authenticate now, but **do not respond to the prompt**. Wait until Step 6 to authenticate instead.
5. Select **Manage devices**. *This tab is located at the bottom of the list.*
  
6. **Choose the phone number **you wish to reactivate from the dropdown list**, **then** select an authentication method**. Complete the verification on your currently enrolled device.
  
7. Once authenticated, you will see a page that lists your devices in square cells.
</details>

### Step 2 - Reactivate

<details>
<summary>Click to view step 2</summary>

1. Click **I have a new phone** *(continued from Step 1 above).*
  
2. Click the **Get started** button.
  
3. **Complete the re-enrollment** by inputting your information following the instructions in the corresponding prompts. See details in **Step 3** below…
</details>

### Step 3 - Install Duo Mobile App & Add Device

<details>
<summary>Click to view step 3</summary>

1. Download the Duo Mobile app from the <u>[App Store](https://itunes.apple.com/us/app/duo-mobile/id422663827)</u> or <u>[Google Play](https://play.google.com/store/apps/details?id=com.duosecurity.duomobile)</u> on your mobile device. Click **Next**.
  
2. On your mobile phone, tap the **Add** button at the top right of the screen to add an account.
  
3. Tap **Use QR code**. You may need to allow access to the camera on your phone.<span style="color: #172b4d"> </span>
  
4. Using 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.*
  
5. Click **Continue** to complete the process.
  
6. On 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 blue **Allow notifications** button to receive notifications, then the **Ok** button.
</details>

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