# No Internet After Installing eSIM: Fix Mobile Data & Roaming (Samsung Phones)

If you installed your DataFly eSIM but the internet isn’t working, don’t worry. In most cases, mobile data won’t work because the eSIM is **not selected as the Mobile Data line** or **Data Roaming is turned off** (or both). Follow the steps below.

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## Step 1: Select your DataFly eSIM for Mobile Data

1. Open **Settings**
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2. Tap **Connections**
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3. Tap **SIM manager**
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4. Under **Mobile data**, select your **DataFly eSIM**
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![image (9) (1)](/uploads/help-center/2026-02_f5b051d6b52a5045.jpg)

🔴 Important

The eSIM name on your phone may look different from the images. Make sure you select the correct eSIM.

## Step 2: Turn ON Data Roaming for your DataFly eSIM

1. Exit **SIM manager** to go back to **Connections**
2. Tap **Mobile networks**
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3. Turn **Data roaming** **ON**for your new eSIM
   _![Screenshot_20260224_203413_Call settings_spotlight](/uploads/help-center/2026-02_382032c2fa6c5724.jpg)_

   🔴 Important

   If your eSIM doesn’t have an ON/OFF button, tap on it and then select “All Networks.”

Done.

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## Troubleshooting: I followed all steps but data still doesn’t work

If you double-checked everything above and mobile data still isn’t working, try the following:

1. Turn **Airplane Mode ON** for at least **5 seconds**, then turn it **OFF**
2. **Restart your phone**
3. Try using the internet again

If it still doesn’t work, you can request a refund anytime: [Request a Refund](https://datafly.app/refund-policy/).

Or you can contact our support team through the live chat available in our app to assist you step by step.

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Source: https://datafly.app/help-center/article/article-cc7316b6/