SKT SIM card free replacement has started! We will organize everything from application methods to tips for making reservations at agencies, replacement locations, who is eligible, and important precautions at a glance. Don't miss it and prepare in advance!

1. SKT SIM card replacement, why do I need to do it now?

Recently, SK Telecom has been facing the issue of possible SIM card information leaks. They say that the safest way to solve this problem is to simply replace the SIM card with a new one, as it is not something that can be solved by simply changing the password.

SKT has also decided to proactively implement free SIM card replacement for ‘all customers.’

2. Who is eligible for SKT SIM card replacement?

Let me summarize it for you.

- Anyone who is a SK Telecom subscriber as of 00:00 on April 18, 2025!
- Includes budget phone users (except when 'SKTelecom' appears on the smartphone screen)
- Also includes eSIM users
- Excluding some models of kids' phones/watch phones

In other words, you can see that this applies to anyone who uses SKT, regardless of whether they were hacked or not!

3. How to apply for SKT SIM card replacement
The replacement method is also simple.

- Start date: Monday, April 28, 2025, 10:00 a.m.
- Required documents: ID card + replacement mobile phone + existing SIM card

You can replace it right away by visiting a nearby T World store or airport roaming center.

But! The dealership will be extremely crowded at first, so if you just go there, you might end up wasting your time.

4. SKT SIM card replacement locations

- T World stores nationwide
- Roaming centers at major airports nationwide

Tip: Be sure to call the store before you visit to check if they have it in stock + if you can make a reservation!

You can search for stores on Naver Map or the T World homepage.

5. Reservation is required before visiting the agency!
These days , there are so many cases where dealerships say, “We don’t have any in stock,” or “We only take reservations.”

I saw a review saying that there were many people who went to three places and were all waiting for reservations.

So definitely!
1. Call the store you want to visit to check inventory.
2. Ask if reservations are available
3. Make a reservation and visit

This way, you can avoid wasted steps!

6. Precautions to be aware of before replacing the SIM card
(1) Contact Backup
Contacts saved on the SIM card may disappear if you replace it. Be sure to back them up in advance on your smartphone or in the cloud!

(2) Check the transportation card function
For those who use a SIM card with NFC transportation card function, you may not be able to use your existing balance if you replace it. You can get a refund or use it all up and replace it.

(3) Preparing for app re-authentication
If you change your SIM card, you may need to re-authenticate things like Internet banking, PASS app, and KakaoTalk authentication.

7. Additional tip: Be sure to apply for SIM card protection service

- You can apply through the T World app or website.
- A feature that prevents SIM card duplication attempts!
- It used to be paid, but now it is provided for free.
- However, if you are using overseas roaming, you must cancel roaming before applying.

You will feel much more at ease because you will receive a confirmation text message right away after applying.

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