[All] SKT SIM replacement method, agency reservation, location, target, and precautions completely summarized

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.
SK Telecom - Wikipedia


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.
SKT, with 23 million subscribers, is hacked… Executives’ SIM card replacement order spreads in the business world due to confidential information leak │ Magazine Hankyung
- 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.


Store Introduction - T world Friends T SHOP agency Tongkeun branch, SK Telecom agency regular store.
- 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
Incheon Airport, Idol Nuisance Departure... SKT SIM Replacement Customers Are Busy


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.

[Social Economy News] SK Telecom Announces Mobile Communication Measures for Chuseok Holidays

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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Comments 87
  • Profile Image
    y8Zebra997
    주변에 SK 유저 많아가지고 혼란 스럽던데~~
    대기업이 참... 어쩌다가... 잘 해결되야 할텐데 말이죠~
  • Profile Image
    선물같은하루
    부모님께도 바꾸시라고 말씀드렸는데...!!!ㅠㅠ
    진짜 SKT 대기업인데 일처리 제대로 해줬으면 좋겠네요.
  • Profile Image
    eumlee913
    부모님 거 해 드리는데 나이드신 분들은 하기 힘드실 것 같더라구요..거기에 대한 대책도 없는 듯ㅠ
  • Profile Image
    ywVervetMonkey995
    skt 유심교체 진짜 불편해요... SKT 불매 해야겠네요 진짜 단체 소송 같이 해야하나;;
  • Profile Image
    메추리알쏙쏙
    SK 유심교체 하려면 예약까지 해야 된다니 진짜 뭔... ㅋㅋㅋㅋ 자기들이 잘못해 놓고 피해 보는 건 오로지 소비자 몫 ㄹㅈㄷ
  • Profile Image
    jjehanpark
    Thanks for the info
  • Profile Image
    gpKookaburra777
    skt대처 정말 짜증나네요 고객들이 대체 왜 고생하면서 구해야하는지 택배로 보내줬으면 좋겠어요 ㅡㅡ
  • Profile Image
    jkHippopotamus634
    SKT 대응에 이번에 실망했어요 나이 많으신 분들은 이런 거 하기 힘들다고요..
  • Profile Image
    예빵순
    아예 유심을 새걸로 교체하는 게 가장 안전한 방법이라니ㅠㅠㅠㅠ
    부모님 세대들이 너무 힘드실거같아요ㅠㅠ 정보도 없구 하시니ㅠㅠ
  • Profile Image
    kmh64466446
    유심 교체로도 안심할수가 없긴 해요 ㅠㅠ 이미 팔린 정보인데 ㅠㅠ 
    예약하는 것도 어렵고 예약해도 한참 기다려야하니 그때까지 걱정만 가득...
  • Profile Image
    uto4489
    물량도 없어서 예약하고 기다려야 하더라고요 skt 대처가 너무 화나요
  • Profile Image
    kim88767937
    어제보니깐 유심 재고 없는 곳이 많던데 ㅠㅠ 다 교체할수있는지 너무 걱정되네요 
    언제까지 기다려야하는지도 걱정이구요 ㅠㅠ
  • Profile Image
    Jajaj2
    통신사 바꾸고 싶어도 위약금 내야하고 열 받네요 며칠동안 이거 때문에 스트레스 받아요
  • Profile Image
    내인생OST김재환
    유심은 바꿨는데. 이제 뭘 더 해야할지.. 감이 안집히고 뭐가 막막해요. 답이 없어서.
  • Profile Image
    pranasumm
    이게 뭔 난리인지 모르겠네요
    우편으로 보내주든지 해야지
  • Profile Image
    soOstrich404
    skt 진짜 개망해야하는거아닌가요 유심도 무상으로 빨리 줘야지 짜증나네요
  • Profile Image
    inKoala26
    유심 언제쯤 교체할수있을까요 택배로 보내주면좋겠네요 ㅡㅡ
  • Profile Image
    g9Tiger402
    정말 SK이번에 이게 무슨 일인가요
    대처도 참 실망스럽고 애꿎은 국민들만 고생이네요 ㅠ 
  • Profile Image
    kjh47594965
    skt 때문에 덩달아 개인정보 유출에 걱정이 많네요 ㅠㅠ 
    이번 사태 어서 빨리 진정이 되었으면 좋겠어요 ㅠㅠ 
  • Profile Image
    aaOctopus677
    진짜 논란이에요 통신사 만으로 이렇게 안심하기는 처음이죠