There are a couple of places that sell pre-paid SIM card and Wifi rental at Seoul Incheon International Airport. All of them offers similar products and packages but I’ve been using KT since the time I was living in Korea, never had a problem with it and works well every time so it just stuck with me until now.

There are three locations at Incheon International Airport, 2 locations at Terminal 1 arrival hall and 1 location at Terminal 2 arrival hall. (See map below for the exact locations and operational hours)

KT Incheon Airport Arrival Hall T2 Location.png

KT Incheon Airport Arrival Hall T1 Location.png

KT Gimpo Airport Arrival Hall Location.png

Source: KT Website

Most of my flights usually arrived at Terminal 2 so the following pictures are from the KT counter at Incheon Airport Terminal 2 arrival hall (1F), between exit 4 and 5.

Greysuitcase - KT Pre-Paid Sim & Wifi Rental at Seoul Incheon Airport Terminal 2 Arrival Hall

First thing you want to do is get a waiting ticket from the machine. Select the red ‘SIM • WIFI’ button on top and the machine will print out a ticket with your queue number on it. If there’s no line, usually the staff will call you right away. But if there’s a line, you can track the queue number on the screen behind the counter. Sometimes the staff call out the numbers in Korean which can be confusing if you don’t speak Korean, so the screen does help with that too. The staff do speak English so communication shouldn’t be an issue. Things that they’ll need from you for making a purchase are your passport and your credit card/cash for payment.

For the Data Packages, there are 8 options available to choose from, depending on the validity of the Sim Card.

For the Wifi Router rental, there are only 2 options available at the counter (although there are 4 options available via online reservation). Wifi Router rental might be a better option if you are traveling in a group and the group for sure will stay together all the time. But if you’re not going to stay together all the time, then the sim card option might be a better option for flexibility, just in case people in your group need to split to go to different places. Plus with Sim Card, you can top up the call/text plan which comes pretty handy for ordering Kakao Taxi through the app or for restaurant/cafe reservations (most places in Seoul now have the queue machine where you can put your phone number and it’ll give you a text notification when your table is ready so you don’t have to wait around at the restaurant).

I usually just buy the sim card because it’s more convenient, I don’t have to bring around yet another extra gadget in my bag and I don’t have to return it before I fly out. Since I usually stay for a month during my trip, I usually get the 30 Days Data Plan (₩71,500) with the additional ₩5,500 Call/SMS top up (see the pink boxes on the picture below). If you ran out of balance and want to top up or extend your plan, you can conveniently do it online on their website, sparing you the hassle to have to come back to the airport.

If you want to save some money, there’s a 10% discount if you reserve your Sim Card (and Wifi Router) online. They have more options for the packages too that’s not available at the counter as well as eSim option if you choose to get one.

After you make your purchase, they’ll give you the Sim Card in a small plastic pouch with a Sim eject tool included. You just have to switch the sim card with the one that you have on your phone, restart your phone and everything should works (but just in case it doesn’t, I would recommend you to test the sim card before you leave the airport just to be safe). And with that you’re set to go.