When switching to a new phone while using an eSIM from a Korean mobile virtual network operator (MVNO), you cannot reuse a QR code that has already been activated on another phone. You need to have the eSIM reissued to change devices. Providers such as Iyagi Mobile, Gogo Mobile, and Skylife list an eSIM reissue fee of KRW 2,750. The application process varies depending on your MVNO.
The order of the process is particularly important if you plan to sell or factory-reset your old phone. The safer approach is to complete eSIM activation on your new phone, confirm that calls and mobile data work, and only then prepare your old device for disposal, sale, or reuse.
Can You Reuse an Existing eSIM QR Code on a New Phone?
A QR code that has already been used to activate an eSIM cannot be reused on another phone.
An eSIM works by downloading a mobile carrier's subscription information to a subscriber identity module embedded in the phone. Unlike a physical SIM card, it cannot simply be removed from one phone and inserted into another.
According to guidance from Korean MVNO providers, changing devices requires the eSIM to be reissued using the identifying information of the new phone.
Even if you still have the original QR code in a text message or email, that does not mean it can be used on your new phone.
However, it is important to distinguish between different situations involving QR code reuse. Skylife provides separate guidance for situations requiring reissuance, such as changing devices or deleting an eSIM, and certain situations in which an existing QR code may be used to download the eSIM again.
Therefore, if you are transferring your mobile service to a new phone, check your provider's eSIM reissuance procedure before attempting to scan the original QR code again.
When Does the KRW 2,750 eSIM Reissue Fee Apply?
According to guidance from several Korean mobile carriers and MVNO providers, a KRW 2,750 fee applies when an eSIM is reissued because the subscriber is changing devices.
For example, Iyagi Mobile explains that an eSIM must be reissued when changing devices because the device identification information associated with the eSIM changes. It charges a reissue fee of KRW 2,750.
Gogo Mobile's eSIM FAQ also states that an existing QR code cannot be reused on another device and that the reissue fee is KRW 2,750.
Skylife likewise lists an eSIM reissue fee of KRW 2,750, including value-added tax (VAT), when changing devices.
An important distinction is the difference between your monthly mobile plan charge and the eSIM issuance fee. The eSIM reissue fee covers issuing the subscription information again for installation on a phone. It is not a recurring monthly mobile plan charge.
However, you should not assume that every Korean MVNO charges exactly the same amount in every situation. Check your provider's actual billing rules and whether any promotional offers apply.
What Is the Correct Order for Transferring an eSIM to a New Phone?
The process is to confirm that your new phone supports eSIM, request a device change from your existing Korean MVNO provider, and then download and activate the newly issued eSIM.
1. Check whether your new phone supports eSIM
Confirm that your new phone model supports eSIM. Even phones from the same manufacturer may have different eSIM capabilities depending on the country of release and specific model.
2. Find your new phone's IMEI and EID
The IMEI is the phone's device identification number, while the EID identifies its embedded SIM. On supported devices, you can display these numbers by entering `*#06#` in the phone app. Prepare the identification numbers required by your mobile provider.
3. Request an eSIM device change from your MVNO
Contact customer support or use the application channel provided by your MVNO to request an eSIM device change. Confirm that you are changing devices while keeping your existing phone number, and ask about the reissue fee and identity verification procedure.
4. Download the eSIM on your new phone
Once your provider completes the reissuance process, download the eSIM to your new phone using the instructions provided. Because this step requires an internet connection, it is advisable to have Wi-Fi available beforehand.
5. Verify calls and mobile data before preparing your old phone
Check that outgoing and incoming calls, text messages, and mobile data work correctly on your new phone. Afterward, back up the data on your old phone and proceed with a factory reset.
During the actual device-change process, service on your existing phone may be disconnected before activation on the new phone is complete. Do not assume that both phones will be able to use the mobile service simultaneously throughout the transition.
Should You Delete the eSIM from Your Old Phone First?
It is generally better to avoid deleting the existing eSIM before completing the device-change procedure.
Deleting an eSIM from your old phone does not automatically transfer your mobile service to the new phone. Instead, it may create difficulties if you still need to receive verification text messages or phone calls on the old device.
If you intend to sell your old phone secondhand or return it through a trade-in program, complete activation and data transfer on your new phone first.
If you accidentally delete your existing eSIM, contact your MVNO to ask whether it can be downloaded again or must be reissued, rather than repeatedly attempting to scan the QR code on your own.
What Is the Difference Between Moving a Physical SIM and Transferring an eSIM?
The biggest difference is that a physical SIM card can be removed and inserted into a compatible new phone, while transferring an eSIM may require your mobile provider to reissue the subscription information.
| Category | Physical SIM (USIM) | eSIM |
|---|---|---|
| Subscription information storage | Removable card | Chip embedded in the phone |
| Changing phones | Move the existing card | Issue and download an eSIM for the new device |
| QR code | Not required | Used according to the provider's instructions |
|---|---|---|
| Device-change cost | No need to purchase another card when reusing an existing compatible SIM | KRW 2,750 reissue fee at the providers covered here |
| Important considerations | SIM card size and mobile network compatibility | Device support, reissuance requirements, and internet connectivity |
Whether a physical SIM or eSIM is more suitable depends on how frequently you change phones and how you configure your mobile subscriptions.
If you change phones frequently, you should consider the eSIM reissuance procedure and associated fees. On the other hand, eSIM can be convenient if you want to activate mobile service without a physical SIM card or configure multiple mobile subscriptions on one phone.
What Should You Confirm and Request from Your Korean MVNO Provider?
Your first step should be to contact your current MVNO's customer service team and confirm how to request an eSIM device change and how much reissuance costs.
Online applications, customer service procedures, and identity verification methods may differ between providers. Skylife, for example, instructs customers to request a device change through customer service and prepare the new phone's IMEI and EID.
Before submitting your request, check the following:
Whether the request is a device change that preserves your existing phone number and mobile plan.
Whether your new phone supports eSIM activation with your current provider.
How much the eSIM reissue fee is and how it will be charged.
How you will receive the new QR code or eSIM download instructions.
At what point your existing mobile service will be disconnected during activation.
If you have already purchased a new phone, it is important to start the eSIM device-change procedure with your current provider before factory-resetting your old phone. Once the eSIM has been reissued, verify that calls and mobile data work on the new device. Following this order can help reduce unnecessary service interruptions and problems requiring additional setup.
