Is your eSIM not activating or showing no network? Learn how to troubleshoot QR code errors, activation failures, network problems, and eSIM setup issues on Android and iPhone.

An eSIM, or embedded SIM, allows your phone to connect to a mobile network without requiring a physical SIM card. It is especially useful for travelers, dual-SIM users, and people switching between mobile carriers.

Instead of inserting a plastic SIM card, you download a carrier’s mobile plan directly to the phone. Depending on the carrier, activation may involve scanning a QR code, using a carrier app, entering activation details manually, or following an on-screen setup process.

However, eSIM activation doesn’t always go smoothly.

You may see messages such as “Unable to Activate eSIM,” “Activation Failed,” “eSIM Not Supported,” “Invalid QR Code,” or “No Service.”

These problems are often caused by device compatibility, carrier provisioning, internet connectivity, incorrect activation information, or an eSIM profile that has already been used.

This guide explains how to troubleshoot common eSIM activation problems safely on Android and iPhone.

Common eSIM Problems

An eSIM setup problem can appear in several ways.

You may experience:

• eSIM not activating
• eSIM activation failed
• eSIM QR code not working
• eSIM showing no network
• eSIM showing “No Service”
• eSIM not supported
• Invalid QR code
• Unable to add cellular plan
• Mobile data not working after activation
• Calls or SMS not working after eSIM installation
• eSIM stuck during setup

The correct solution depends on whether the problem occurs during installation or after the eSIM has already been installed.

Before Troubleshooting: Check eSIM Compatibility

Not every smartphone supports eSIM.

Even when a phone model supports eSIM, availability can depend on:

• Exact model number
• Regional variant
• Carrier
• Country
• Software version
• Mobile plan

For example, two phones with similar names may have different SIM capabilities depending on the market where they were sold.

Before requesting an eSIM, check your manufacturer’s specifications and confirm compatibility with your carrier.

Fix 1: Check Your Internet Connection

Your phone generally needs an internet connection to download an eSIM profile during activation.

For the most reliable setup:

1. Connect to a stable Wi-Fi network.
2. Turn off any VPN temporarily.
3. Make sure the Wi-Fi connection has working internet access.
4. Restart the activation process.

Avoid activating an eSIM over an unstable connection if possible.

Fix 2: Verify the eSIM QR Code

If your carrier provided a QR code, make sure you’re scanning the correct one.

Check that:

• The QR code belongs to your mobile plan.
• The code hasn’t already been used.
• The code is clearly visible.
• You’re scanning the entire QR code.
• Your phone’s camera can focus correctly.

If you receive an “Invalid QR Code” message, don’t repeatedly guess or modify the activation details.

Contact your carrier and ask whether the eSIM profile needs to be reissued.

Fix 3: Check Whether the QR Code Was Already Used

Many eSIM activation codes are intended for a specific installation process.

If an eSIM was previously installed on another phone, the same QR code may not work again.

This can happen when:

• You changed phones.
• You deleted the eSIM.
• You reset the phone.
• You accidentally removed the eSIM during troubleshooting.

In these situations, your carrier may need to issue a new activation code or re-provision the eSIM.

Fix 4: Restart Your Phone

A simple restart can refresh:

• Cellular services
• SIM management
• Network registration
• eSIM services

After restarting, check the cellular settings again and see whether the eSIM appears correctly.

Fix 5: Make Sure the eSIM Is Enabled

Sometimes the eSIM has been installed successfully but is disabled.

Open your phone’s cellular or SIM settings and check whether the eSIM line is active.

Look for options such as:

Mobile Network → SIMs

or:

Settings → Cellular / Mobile Service

Make sure:

• The eSIM line is enabled.
• Mobile data is assigned to the correct SIM.
• Calls and SMS use the intended line.
• Network selection is set correctly.

Menu names vary between Android manufacturers and iPhone versions.

Fix 6: Check Airplane Mode

Make sure Airplane Mode is turned off.

You can also use it as a quick network refresh:

1. Turn Airplane Mode on.
2. Wait approximately 10 seconds.
3. Turn Airplane Mode off.
4. Wait for the eSIM to reconnect.

This forces the phone to restart its cellular connection.

Fix 7: Check for a Carrier Network

If the eSIM is installed but displays “No Service,” the activation itself may have succeeded while network registration has not.

Check:

• Cellular signal
• Carrier name
• Network selection
• Mobile data settings
• Roaming settings if you’re traveling

If you are using an international travel eSIM, make sure the plan covers the country you’re currently in.

Fix 8: Check Mobile Data Settings

If calls work but mobile internet doesn’t, the eSIM may not be selected for data.

Go to your SIM or cellular settings and check:

Mobile Data → Select eSIM

If your phone has two active SIMs, make sure the intended eSIM is selected for mobile data.

Some carriers may also require specific APN settings. Don’t manually change APN values unless your carrier provides the correct information.

Fix 9: Check Data Roaming for Travel eSIMs

Travel eSIMs often use roaming networks.

If you’re using a travel eSIM abroad and the carrier’s instructions specifically require data roaming, make sure it is enabled for that eSIM.

However, don’t enable roaming blindly on your primary SIM if you are trying to avoid unexpected roaming charges.

Always follow the travel eSIM provider’s instructions.

Fix 10: Install Software Updates

Outdated software can sometimes cause cellular or eSIM compatibility problems.

Check for available updates.

Android

Go to:

Settings → System / Software Update

iPhone

Go to:

Settings → General → Software Update

Install available updates and restart the phone afterward.

Fix 11: Reset Network Settings

If the eSIM was previously working but suddenly stopped connecting, resetting network settings can help.

Depending on your device, look for:

Settings → System → Reset Options → Reset Wi-Fi, Mobile & Bluetooth

or:

Settings → General → Transfer or Reset iPhone → Reset → Reset Network Settings

This may remove:

• Saved Wi-Fi networks
• Bluetooth pairings
• Network preferences
• Some VPN configurations

Your eSIM profile may remain installed, but always check your device’s warning before confirming the reset.

Fix 12: Do Not Delete a Working eSIM

This is one of the most important things to remember.

If your eSIM is currently working but you’re experiencing a different network problem, don’t delete the eSIM just to start over unless your carrier has confirmed that you can reinstall it.

Deleting an eSIM may require:

• A new QR code
• Carrier re-provisioning
• A new activation process

If the original activation code has already been used, reinstalling the profile may not be possible without carrier assistance.

Fix 13: Check Carrier Support

Sometimes there is nothing wrong with the phone.

The carrier may need to activate or re-provision the eSIM on its network.

Contact your carrier if:

• Activation repeatedly fails.
• The QR code is invalid.
• The eSIM shows no service after installation.
• Your number hasn’t transferred correctly.
• Calls or SMS don’t work.
• The eSIM was accidentally deleted.
• You changed devices.
• The carrier account doesn’t show the eSIM.

Ask the carrier to verify that the eSIM profile is correctly provisioned for your device.

What If the eSIM Works for Data but Not Calls?

This can happen when the data connection is active but voice services aren’t properly provisioned.

Check:

• Whether your carrier supports voice service over the eSIM.
• Whether VoLTE is supported.
• Whether the correct line is selected for calls.
• Whether your account has voice service enabled.
• Whether the phone has registered correctly with the carrier.

If mobile data works but calls consistently fail, carrier support may be required.

What If the eSIM Shows “No Service”?

If the eSIM is installed but shows no network:

1. Restart the phone.
2. Toggle Airplane Mode.
3. Check that the eSIM is enabled.
4. Check network selection.
5. Verify your plan is active.
6. Check whether you are in a supported coverage area.
7. Confirm roaming settings for travel plans.
8. Contact the carrier if the problem continues.

Testing the eSIM in another compatible device may also help, although carrier restrictions can apply.

What If the eSIM Cannot Be Added?

If your phone won’t even allow you to add the eSIM, check:

• Whether the phone supports eSIM.
• Whether the device is carrier-compatible.
• Whether the phone is locked to another carrier.
• Whether the eSIM profile is valid.
• Whether the device software is up to date.
• Whether the carrier supports eSIM on that exact model.

A carrier lock can prevent an eSIM from being used with another network.

eSIM vs Physical SIM Troubleshooting

One advantage of a physical SIM is that you can easily remove it and test it in another compatible phone.

With an eSIM, troubleshooting often depends more heavily on carrier provisioning.

This is why contacting the carrier can be particularly important when an eSIM profile has been deleted or cannot be reinstalled.

When You Should Contact Your Carrier

Contact your carrier rather than repeatedly attempting activation if:

• The QR code is invalid.
• The activation code has already been used.
• Your eSIM was deleted.
• The number isn’t appearing correctly.
• The plan isn’t active.
• The phone shows no service after successful installation.
• Calls and SMS don’t work.
• You changed devices.
• The carrier needs to re-provision your account.

In many cases, the carrier can issue a replacement QR code or activate the eSIM remotely.

Common eSIM Activation Mistakes to Avoid

Avoid these mistakes:

• Deleting a working eSIM unnecessarily.
• Using an old QR code after switching phones.
• Sharing your activation QR code publicly.
• Repeatedly scanning an invalid code.
• Changing APN settings without carrier instructions.
• Ignoring device compatibility requirements.
• Assuming every phone variant supports eSIM.
• Forgetting to enable the eSIM after installation.

Keeping your activation information private is also important because an eSIM QR code can contain sensitive provisioning information.

Frequently Asked Questions

Why is my eSIM not activating?

The most common causes are device incompatibility, incorrect QR codes, poor internet connectivity, carrier provisioning problems, or an activation code that has already been used.

Why does my eSIM show no network?

The eSIM may be installed but not properly registered with the carrier. Check the line settings, network coverage, roaming requirements, and account status.

Can I reuse an eSIM QR code?

It depends on the carrier. Some QR codes are reusable while others become invalid after the eSIM profile has been installed. Contact your carrier if you’re unsure.

Should I delete my eSIM and reinstall it?

Not unless your carrier recommends it. Deleting an eSIM can make recovery more difficult if the original activation code cannot be reused.

Does eSIM work without Wi-Fi?

The initial eSIM download generally requires an internet connection. Wi-Fi is usually the safest option for activation. Once activated, the eSIM uses the cellular network according to your plan.

Final Thoughts

An eSIM activation problem can look complicated, but most failures come down to a few common issues: device compatibility, incorrect activation information, internet connectivity, network configuration, or carrier provisioning.

Start by confirming that your phone and mobile plan support eSIM, then connect to reliable Wi-Fi, verify the QR code, restart the device, and check your SIM settings. If the eSIM has already been installed, avoid deleting it unless your carrier specifically tells you to do so.

If you continue seeing “Activation Failed,” “Invalid QR Code,” “eSIM Not Supported,” or “No Service,” contacting your carrier is usually the most effective next step. The carrier can verify your account, check the eSIM provisioning, and issue a replacement activation profile when necessary.

With the correct setup and carrier support, switching from a physical SIM to an eSIM can be quick, convenient, and reliable.