Why is my eSIM not working? Reasons and 15 ways to fix it

Why is my eSIM not working? 

An eSIM may stop working for several reasons, and most of them have little to do with the eSIM itself. If you’re unsure what an eSIM is, it’s a digital SIM that allows your phone to connect to a cellular network without a physical SIM card. Just like with a physical SIM card, connection problems often come down to activation issues, phone settings, network coverage, or device compatibility. The good news is that these problems are usually easy to identify and fix once you know where to look.

Some of the most common reasons include:

• The eSIM didn’t activate properly. The installation process may not have finished correctly. This issue can happen if the QR code scan failed, the activation step was interrupted, or the eSIM profile didn’t fully download to the phone.

• Data roaming is turned off. Many travel eSIM plans require data roaming to stay enabled. If roaming is disabled in your cellular settings, your phone may not connect to local networks abroad.

• Incorrect APN (Access Point Name) settings. The APN tells your phone how to connect to the mobile data network. When APN settings are missing or incorrect, mobile data won't work even if the eSIM appears active.

• Weak or unavailable network signal. Your phone needs a supported network to connect to. Poor signal coverage, temporary outages, or unsupported networks in certain areas can prevent the eSIM from working.

• Outdated phone software. Older versions of iOS or Android may cause compatibility problems with eSIM profiles. A system update often resolves these issues.

• The eSIM profile is turned off. Phones that support multiple SIM profiles allow users to enable or disable them manually. If the eSIM line is switched off in your cellular settings, the device won’t use it for data.

• Another SIM is set as the primary line. On dual-SIM devices, the phone may use a different SIM for mobile data by default. The eSIM will stay inactive until you select it as the active data line.

• The phone is carrier-locked. Some phones only work with a specific carrier. If the device is locked, it may reject eSIM profiles from other providers.

15 ways to fix a non-working eSIM

If your eSIM refuses to connect, the solution often turns out to be simple. Many connection problems disappear after a quick restart, a small settings change, or a short network refresh. Phones sometimes fail to register on a network, install the profile correctly, or use the right data line — all of which can interrupt your connection. While the benefits of an eSIM include quick setup and flexible connectivity, small technical hiccups can still happen from time to time.

Below, you’ll find practical fixes that solve most eSIM issues. Start with the quick checks, then move on to deeper troubleshooting if the connection still doesn’t work.

1. Make sure the eSIM is installed correctly 

Your phone cannot connect to a network if the eSIM profile didn’t install properly. Note that installation problems may occur after a failed QR code scan or if the setup process stops before completion. 

On an iPhone (iOS):

1. Open “Settings.”

2. Tap “Cellular” or “Mobile data.”

3. Look for your eSIM under “SIMs” or “Cellular plans.”

4. If the profile doesn’t appear, tap “Add eSIM” and install it again.

Note: If your iPhone eSIM isn’t working, find more tips in our guide for Apple users.

On a Samsung phone (Android):

1. Open “Settings.”

2. Tap “Connections.”

3. Select “SIM manager.”

4. Check whether the eSIM profile appears in the list.

5. If it’s missing, tap “Add eSIM” and scan the QR code again.

2. Toggle airplane mode

A quick airplane mode reset can help your phone reconnect to the cellular network. When you turn it on, the device disconnects from all wireless connections. After you switch it off again, the phone searches for networks and often restores the connection.

On an iPhone (iOS):

1. Open “Settings.”

2. Turn “Airplane mode” on.

3. Wait about 10–15 seconds.

4. Turn it off and allow the phone to reconnect.

On a Samsung phone (Android):

1. Open “Settings.”

2. Tap “Connections.”

3. Turn “Airplane mode” on.

4. Wait about 10–15 seconds.

5. Turn it off and allow the phone to reconnect to the network.

3. Toggle the eSIM profile 

Your phone may fail to use mobile data if the eSIM profile is disabled. A quick toggle often forces the device to reconnect to the network and restore the data connection.

On an iPhone (iOS):

1. Open “Settings.”

2. Tap “Cellular” or “Mobile data.”

3. Select your eSIM line.

4. Turn the line off, wait a few seconds, then turn it on again.

On a Samsung phone (Android):

1. Open “Settings.”

2. Tap “Connections.”

3. Select “SIM manager.”

4. Turn the eSIM profile off.

5. Wait a few seconds, then turn it on again.

4. Restart the phone

Sometimes, a simple restart clears temporary network glitches and forces the device to reconnect to available carriers. Phones sometimes hold onto outdated network information, which may prevent the eSIM from working properly.

On an iPhone (iOS):

1. Press and hold the side button and volume button.

2. Drag the power slider to turn the phone off.

3. Wait about 10–15 seconds.

4. Press the side button again to turn the device back on.

On a Samsung phone (Android):

1. Press and hold the power button.

2. Tap “Restart” or “Reboot.”

3. Wait for the phone to restart and reconnect to the network.

5. Check the APN settings

Incorrect APN settings can block mobile data even when the eSIM appears active. The APN defines how your phone connects to the network.

On an iPhone (iOS):

1. Open “Settings.”

2. Tap “Cellular” or “Mobile data.”

3. Select your eSIM line.

4. Tap “Cellular data network.”

5. Check that the settings match the ones provided by your eSIM service.

On a Samsung phone (Android):

1. Open “Settings.”

2. Tap “Connections.”

3. Select “Mobile networks.”

4. Tap “Access point names (APN).”

5. Check that the settings match the values provided by your eSIM service.

6. Turn on data roaming

Many travel eSIM plans require data roaming to stay enabled so the phone can connect to local partner networks. Without roaming, the device may fail to access mobile data even when the eSIM is active. To solve the issue, simply enable data roaming on your chosen device.

On an iPhone (iOS):

1. Open “Settings.”

2. Tap “Cellular” or “Mobile data.”

3. Select your eSIM line.

4. Turn “Data roaming” on.

On a Samsung phone (Android):

1. Open “Settings.”

2. Tap “Connections.”

3. Select “Mobile networks.”

4. Turn “Data roaming” on.

7. Turn off other eSIMs 

Phones that support multiple SIM profiles may prioritize the wrong line for mobile data. Turning off other eSIMs helps your phone focus on the active profile and connect to the correct network.

On an iPhone (iOS):

1. Open “Settings.”

2. Tap “Cellular” or “Mobile data.”

3. Select the SIM or eSIM you want to disable.

4. Turn the line off.

5. Keep your main eSIM active for mobile data.

On a Samsung phone (Android):

1. Open “Settings.”

2. Tap “Connections.”

3. Select “SIM manager.”

4. Turn off the other SIM or eSIM profiles.

5. Leave the main eSIM enabled.

8. Update software

As self-explanatory as this tip may sound, outdated system software can cause compatibility issues with eSIM profiles and network settings. A software update often resolves bugs and improves network connectivity.

On an iPhone (iOS):

1. Open “Settings.”

2. Tap “General.”

3. Select “Software update.”

4. Install any available updates.

On a Samsung phone (Android):

1. Open “Settings.”

2. Tap “Software update.”

3. Select “Download” and install.

4. Install the available update and restart the device if prompted.

9. Adjust network mode

Often, incorrect network mode settings may prevent your phone from connecting to the correct network. Adjusting the preferred network type can help the device find a compatible connection.

On an iPhone (iOS):

1. Open “Settings.”

2. Tap “Cellular” or “Mobile data.”

3. Select your eSIM line.

4. Tap “Voice & data.”

5. Choose 5G Auto, 5G On, or LTE, depending on availability.

On a Samsung phone (Android):

1. Open “Settings.”

2. Tap “Connections.”

3. Select “Mobile networks.”

4. Tap “Network mode.”

5. Choose the preferred network type, such as 5G/LTE/3G (Auto connect).

10. Check signal coverage

To work properly, your eSIM needs a supported network with stable signal coverage. Mobile data may fail in areas with weak reception, remote locations, underground spaces, or buildings with heavy signal interference.

On an iPhone (iOS):

1. Check the signal bars at the top of your screen.

2. Move to an area with stronger reception if the signal is weak.

3. Try reconnecting to mobile data after relocating.

On a Samsung phone (Android):

1. Check the signal indicator at the top of the screen.

2. Move to an area with a stronger signal if reception is weak.

3. Allow the phone to reconnect to the network once the signal improves.

11. Make sure your phone isn’t carrier-locked

In some cases, a phone only works with a specific mobile carrier. A carrier-locked device may reject eSIM profiles from other providers, which prevents the connection from working.

On an iPhone (iOS):

1. Open “Settings.”

2. Tap “General.”

3. Select “About.”

4. Find “Carrier lock.”

5. If the status shows “SIM locked,” the device may not support other eSIM providers.

On a Samsung phone (Android):

1. Open “Settings.”

2. Tap “Connections.”

3. Select “Mobile networks.”

4. Check whether the device allows other network providers.

5. Contact your carrier if the phone appears locked.

12. Update carrier settings

Carrier settings control how your phone connects to the cellular network. Carriers occasionally release updates that improve connectivity, fix bugs, or adjust network compatibility. Installing the latest settings can help restore the connection if your eSIM stops working.

On an iPhone (iOS):

1. Open “Settings.”

2. Tap “General.”

3. Select “About.”

4. Wait a few seconds to see if a “Carrier settings update” prompt appears.

5. Tap “Update” if one is available.

On a Samsung phone (Android):

1. Open “Settings.”

2. Tap “Connections.”

3. Select “Mobile networks.”

4. Tap “Network operators.”

5. Allow the phone to reconnect to the available carrier network.

13. Reset network settings

Network settings may become misconfigured after updates, travel, or SIM changes. In such cases, reset network settings can clear saved connections and restore the phone’s default network configuration.

On an iPhone (iOS):

1. Open “Settings.”

2. Tap “General.”

3. Select “Transfer or reset iPhone.”

4. Tap “Reset.”

5. Choose “Reset network settings.”

On a Samsung phone (Android):

1. Open “Settings.”

2. Tap “General management.”

3. Select “Reset.”

4. Tap “Reset network settings.”

5. Confirm the reset.

14. Reinstall the eSIM 

The eSIM may not install correctly during the first setup. Removing the profile and installing it again often helps the phone recognize the eSIM properly.

On an iPhone (iOS):

1. Open “Settings.”

2. Tap “Cellular” or “Mobile data.”

3. Select the eSIM line.

4. Tap “Delete eSIM.”

5. Install the eSIM again using the QR code or activation method.

On a Samsung phone (Android):

1. Open “Settings.”

2. Tap “Connections.”

3. Select “SIM manager.”

4. Choose the eSIM profile.

5. Remove it and install the eSIM again using the QR code.

15. Contact carrier support

If none of the fixes work, the issue may sit on the carrier side. Activation problems, account restrictions, or network outages sometimes require help from support.

On an iPhone (iOS):

1. Open the eSIM app or visit your carrier’s support page.

2. Contact customer support through chat or email.

3. Provide your device model and eSIM activation details.

On a Samsung phone (Android):

1. Open the eSIM app or your provider’s support page.

2. Contact customer support through chat or email.

3. Share your device model and eSIM setup details.

Why is my Saily eSIM not working? 

An eSIM from Saily can run into the same problems as any other eSIM, so the causes and solutions are usually the same. In most cases, the steps covered above will resolve the issue and restore your connection.

Also, remember that the Saily eSIM app works as a platform that connects you to local partner networks rather than acting as a mobile carrier itself. Because of that, the quality of the connection depends on both your device setup and the local network available in your location. Saily focuses on reliable coverage, transparent pricing, and responsive customer support to make the experience as smooth as possible. 

If you’re setting up your connection for the first time, you can download the eSIM app and activate your plan directly on your phone. To learn more about the experience, feel free to read Saily reviews.

You can also check our troubleshooting guides for other providers, such as AT&T eSIM not working, Holafly eSIM not working, and Airalo eSIM not working. Moreover, visit our guide on Saily eSIM not working for more help related to the Saily app.