Visitors or foreigners coming to Korea which are purchase online prior to the arrival and pick up at the airport, or getting the SIM card from the airport telecom company service desk or airport convenience stores after arrival.


Make sure your phone is unlocked.

If the device you are willing to use is restricted to specific telecom company or specific country, you cannot use the device with Korean local SIM

You unlock your phone by calling your cell carrier. They will unlock it for you as long as your phone is fully paid off.

Make sure the sim card fits.

Firstly, make sure to check if your phone has a sim card slot (some don’t).

The most common sim card size is the nano one. However, some phones may have micro or normal sized sim card slots. You can pick the size your device allows

SIM CARD Products and plans

South Korea has three main mobile carriers: KT Olleh, SK Telecom, and LG U+. All of these have 3G and 4G, networks which include call, text, and data services.

Where to Buy

There are 3 ways to buy the sim cards. What you need to be aware is it is not absolutely impossible to purchase in town outside of the airport but pretty bothering.

  1. Online

It is strongly suggested and cheapest way to purchase online, make a reservation and pick up at the airport after arrival. The most reliable and commonly used online SIM shopping malls are Korea SIM card( ) and roaming kt( ) now. Especially Korea SIM card is highly recommended because it’s on market directly from the telecom company and has KT’s every SIM solution (Premium 4G LTE SIM and unlimited data SIM) for tourists with cheapest price reward system.

So please consider your travel period and usage when checking the sim card plans on this website.

  1. Offline Store

If you haven’t purchased the SIM card online in advance, getting one from the airport convenience store is another great way to get. There’s no differences from other countries where you can easily buy SIM cards from continence stores. It makes your trip easier and recommended to buy from airport convenience store

# Incheon International

Airport: 1F Arrival Floor CU 1,2,3

# Gimpo International Airport: 3F 7-Eleven
(You can also get from Domestic Terminal or Subway Station “Gimpo Airport”)

Separate from purchase, you can activate the SIM card by yourself whenever you need. As written on the description, you can upload simple information to register and it’s ususally activated within around 15 minutes.

SIM card on the board at the arrival floor so you can get help. (365 days 8AM-8PM)

  1. Airport Roaming Desk

Likewise, once you’re arrived at the airport and need the SIM card urgently, it is also one of the great idea to visit the telecom roaming desk. There are different roaming desks from different telecom companies (SKT, KT, LG U+) but KT is absolutely dominant for tourist SIM for foreigners as mentioned above. Again, SKT and LG U+ is specialized more on WiFi router rather than SIM card. In case of KT roaming desk in Incheon International Airport, it’s very busy with many crowds so you may need to wait more than an hour if need to. And there, it is a bit more expensive than online.

Followings are SIM Card Plans for each telecom company.



The prepaid option from KT allows you to pay beforehand for a certain amount of days. You can choose between: 1) unlimited data only, or 2) unlimited data with rechargeable cell and text service (extra fee).

  1. LG U+


The prepaid LTE data option from LG U+ allows unlimited data with free incoming texts and calls. It is cheaper to reserve it online.

  1. SKT


SKT has an option for prepaid data tickets, which is charged by daily use. This gives you unlimited data with no option for text or calling.

There are various sim card plans to choose. Thus, you should pick one that best fits your plan of stay in Korea. Enjoy your stay in Korea!