In April 2023, I purchased 3 eSIMs what I can use in South Korea at KKday. 2 are roaming eSIMs, and another is an authentic eSIM by SK, one of a Korean telecommunication companies.
This is my recommend to use when you visit South Korea.
I wanted to have a Korean phone number, receiving is pretty enough. I wanted to use that phone number for a one day packaged tour.
LG U+ required to sign up on their site, and seems KT requires physical SIM to receiving. I needed a eSIM for 3 days, SK looks better.
QR Code from “Korea SIM Card”
In this time, 7 mins after purchasing at KKday, I got a mail from “Korea SIM Card”, there is a QR Code and a phone number.
![korea SIM](https://live.staticflickr.com/65535/52814257616_616ab325fc_c.jpg)
I think it is not MVNO, because there is a phrase of “If you encounter technical troubles, please contact SKT customer center”.
I could not finish “activate”
I read the QR code while I was in Japan, but I could not finish it, but I found that 010 number was added as my phone number, I thought it was already installed.
When I arrive at South Korea, my iPhone SE2 did not catch the wire, on the other hands, iPhone 13 Pro caught SK wire (there were roaming eSIMs), I shut it down and activate few mins later. This eSIM started working.
This is the screenshot of the setup.
![](https://sunandsky.jp/wp-content/uploads/2023/05/IMG_0202-e1683427254714.png)
You have no need to change “Data Roaming” part, because it is not a roaming SIM.
Public Alert
It was Sunny and nice air condition in the arrival day, but the next day, it was attacked by Chinese Yellow Dust. When I visited Gyeongjyu, I got something alert.
![public allart](https://live.staticflickr.com/65535/52876453474_7e3f457de1_c.jpg)
It is Yellow Dust warning. My phone mode is Japanese, 緊急速報 means “Public Alert”. Of course I don’t read their letters, but we “Translation”. It worked pretty well.
What the day before I got the Yellow Dust alert, seems it is about a missed old woman.
There were no such alert in the roaming phone, this is the reason why I recommend to use this authentic SK SIM.
When you are not able to use eSIMs, SK physical SIM should be my recommendation.