Galaxy S23 Ultra eSIM Not Working: Fixes & Setup

If your Galaxy S23 Ultra eSIM is not working, the fix usually involves checking your carrier’s eSIM activation, ensuring your phone’s software is updated, and re-adding the eSIM profile. This guide covers the full setup process and troubleshooting steps to get your eSIM functioning again.

What is an eSIM and How Does It Work on the S23 Ultra?

An eSIM (embedded SIM) is a digital SIM that lets you activate a cellular plan without a physical SIM card. The Galaxy S23 Ultra has both a physical SIM slot and an eSIM, allowing you to use two numbers simultaneously (Dual SIM). The eSIM profile is downloaded and installed directly onto your phone’s hardware, and it can be managed in the Settings app. When you switch carriers or travel, you can add a new eSIM profile without needing to insert a physical card.

How to Set Up an eSIM on Your Galaxy S23 Ultra

Before you begin, make sure your phone is connected to Wi-Fi and that your carrier supports eSIM. The setup process is straightforward:

1. Open the Settings app on your Galaxy S23 Ultra.
2. Tap Connections > SIM card manager.
3. Tap Add eSIM.
4. Choose how you want to add the eSIM:
   • Scan QR code – Use the QR code provided by your carrier.
   • Enter activation code – Manually type the code from your carrier.
   • Download from carrier – Some carriers let you download the profile directly from their app or website.
5. Follow the on-screen prompts to complete the installation. The eSIM will be activated automatically once the profile is downloaded.

If you encounter an error during this process, proceed to the troubleshooting section below.

Common Reasons Why Your eSIM Isn’t Working

Several issues can prevent your eSIM from functioning correctly:

• Carrier not supported: Not all carriers support eSIM on the Galaxy S23 Ultra. Check with your carrier to confirm eSIM compatibility.
• Unlocked vs. carrier-locked: If your phone is locked to a specific carrier, you may only be able to use that carrier’s eSIM. Contact your carrier to unlock the device if needed.
• Outdated software: A pending software update can cause eSIM activation issues. Go to Settings > Software update > Download and install to check.
• Incorrect QR code or activation code: Ensure you are scanning the correct QR code and that the code hasn’t expired.
• Network issues: Sometimes the eSIM profile fails to download due to a poor network connection. Try switching to a different Wi-Fi network.
• Profile conflicts: If you have previously installed an eSIM profile that is corrupted or not fully removed, it may cause conflicts. Delete the old eSIM profile before adding a new one.

Step-by-Step Troubleshooting for eSIM Issues

Follow these steps in order, testing your eSIM after each one:

1. Restart your phone. This simple step often resolves temporary glitches.
2. Check the eSIM status: Go to Settings > Connections > SIM card manager. Ensure the eSIM is toggled on.
3. Remove and re-add the eSIM: In the SIM card manager, tap on the eSIM and select Remove. Then follow the setup steps again to add it back.
4. Reset network settings: Go to Settings > General management > Reset > Reset network settings. This will clear all network configurations, including Wi-Fi, Bluetooth, and mobile data settings. You’ll need to re-enter Wi-Fi passwords afterward.
5. Check for carrier settings update: Sometimes carriers push a settings update that is required for eSIM to work. Go to Settings > Connections > Mobile networks and look for a Carrier settings update option.
6. Contact your carrier: If none of the above works, your carrier may need to re-provision the eSIM or provide a new QR code. They can also confirm that your plan includes eSIM support.

How to Manage Dual SIM with eSIM and Physical SIM

If you’re using both a physical SIM and an eSIM, you can choose which one handles calls, texts, and data. In Settings > Connections > SIM card manager, you’ll see options to set your Preferred SIM for calls, Preferred SIM for messages, and Mobile data. You can also enable Dual SIM always on to receive calls on both numbers simultaneously. Note that when using dual SIM, some features like 5G may be limited on the secondary line, depending on your carrier.

What to Do If Your eSIM Is Stuck on “Activating”

If your eSIM shows “Activating” but never completes, try these steps:

• Wait a few minutes – activation can sometimes take longer than expected.
• Toggle Airplane mode on and off to refresh the network connection.
• Restart your phone.
• Check if your carrier requires a specific APN (Access Point Name) setting. You can find this in Settings > Connections > Mobile networks > Access Point Names.
• If the problem persists, contact your carrier – they may need to resend the activation signal.

Frequently Asked Questions

Can I use an eSIM from a different carrier than my physical SIM?

Yes, you can use an eSIM from a different carrier than your physical SIM, provided your phone is unlocked. This is useful for traveling or having a separate work line. Just make sure both carriers support eSIM on the S23 Ultra.

Will removing the eSIM delete my data?

No, removing the eSIM profile only deletes the cellular plan from your phone. Your contacts, photos, and other data remain intact. You can re-add the eSIM later if needed.

Can I transfer my eSIM to a new phone?

Yes, you can transfer your eSIM to a new phone, but the process varies by carrier. Some carriers allow you to download the eSIM again on the new device, while others require you to contact them to re-provision the eSIM. Check with your carrier for their specific transfer policy.

Why does my eSIM work for data but not for calls?

This usually happens when the eSIM is not set as the preferred line for calls. Go to Settings > Connections > SIM card manager and set the eSIM as the preferred SIM for calls. If it still doesn’t work, your carrier may need to enable voice service on the eSIM.

Is it possible to have two eSIMs on the Galaxy S23 Ultra?

The Galaxy S23 Ultra supports multiple eSIM profiles, but you can only use one at a time. You can store several eSIM profiles and switch between them in the SIM card manager. However, you cannot use two eSIMs simultaneously; you can only use one eSIM and one physical SIM at the same time.

What should I do if my eSIM is not recognized after a software update?

After a major software update, eSIM profiles can sometimes become corrupted. First, restart your phone. If that doesn’t work, remove the eSIM profile and add it again. If the issue persists, contact your carrier to reissue the eSIM QR code.

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