Top 3 prepaid SIM cards for Travelers in South Korea

Data only with the Lowest Cost – Korea SIM Black

The Most Cost Effective and Best Selling – Korea SIM Blue

Perfect SIM with International Call – Korea SIM Red

As you know, Korea SIM card series in are the best selling products in on-line and off-line including airports around South Korea. There are some variations which is sold through other channels but krsim offers the exact products as a authentic company.

There is no absolute SIM because specs has to do with price and the specs people want is very diverse. So, the best SIM depends on individual preference.

Here is the table you can compare one another.

Korea SIM Blue Korea SIM Black Korea SIM Red
Product Image

Product Option 5 days / 7 days / 10 days /
15 days / 30 days
5 days / 10 days / 30 days 1GB / 2GB for 30 days
Description Unlimited Data +
Local Voice and Message
(100min. and 100EA)
Unlimited Data Usage Credit Balance which can be
converted automatically into Data,
Voice and Message
Price (in US$) 23.9 / 28.9 / 32.9 / 42.9 / 60.9 22.5 / 30.9 / 58.8 26.9 / 38.9
Mobile Number
(Voice Call)
Korean Mobile Number
(Starting 010)
Messenger Talk Unavailable
Not available
Messenger Talk available
Korean Mobile Number
(Starting 010)
International Voice Call available
at the lowest rate
Internet Speed World Best Internet Speed
LTE Max. 150Mbps
LTE (5Mbps)
Enough Speed to use
Conventional Internet
World Best Internet Speed
LTE Max. 150Mbps
Recharge Mobile App.
(only once; up to additional 30 days)
No need to Recharge Whenever
Offline : CVS (7-11, GS25, CU)
Online : (during day time)
* Period not extended
Where to pick up Incheon T1, T2, Gimpo and
Gimhae International Airport
4 Major Airport
(Incheon T1, T2, Gimpo, Jeju
and Gimhae) and Busan Harbor
Incheon T1, T2, Gimpo and
Gimhae International Airport
Availability Whoever
(Koreans and Foreigners)
(Koreans and Foreigners)
With Foreigner Passport Only
Activation Online :
24/7 activation
4 Major Airport
kt roaming desk
Online :

Availability, from “EG mobile” to “kt Mmobile”: the History

If you have been ever to Korea and have made choices for some prepaid SIM services for foreigners in the past 3 years, I guess that you may have heard the SIM card which is called “EG mobile”. It is the name of the company, that started prepaid SIM business for foreigners about 3 years ago, in 2013. It concentrated on the sales in shops around Incheon Int’l Airport, Korean convenience store GS25,  (in offline) and internet open market shop (in online).

EG SIM which offer 1GB data at KRW30,000

At that time, there were no competitors in the market and the contents they provide was reasonable to the price. It was so small company that it didn’t worry about Korean government regulation which was not determined at that time (what condition must legally be fulfilled to activate the prepaid SIM for travelers… and so on), and invested aggressively in marketing their products whereas the potential competitors hesitated to enter the business worrying the uncertainty in policy and waited for the decision regarding the market regulation. Sometimes it was recklessly too brave to offend the government. Anyway, as the result, it became the name of prepaid SIM in Korea, itself. It’s the reason why you encounter the name so often in Google search results about prepaid SIM in Korea.

korea telecom song jung gi
One of the Korean Top Actors, Song Joong Gi became the model of kt(Korea Telecom)

But as time went by, the direction of government regulation became somewhat concrete. At last, the subsidiary company of “kt” (korea telecom; the no. 1 telecommunication company who has the most subscribers in S. Korea), “kt Mmobile” began to play in the market and to take up the position in 2015. They have supplied their kt Mmobile SIM card for travelers to the Korean major 2 convenience stores, the Seven-Eleven(7-11) and CU since then and opened internet shopping site,, too. Finally, travelers have become to enjoy the trustful services that the Korean top telecommunication company provides.

kt Mmobile SIM which offer 1GB at KRW29,900

On 1st. March, 2016. GS25 came to be out from the Arrival floor in Incheon Int’l Airport and EG mobile lost the place to sell their products there. Now the Airport has only three CU convenience store there, so kt Mmobile SIM card comes to be the most dominant and popular prepaid SIM card for traveler in S. Korea, now.

One of the 3 CU convenience stores on the arrival floor in the Incheon Int’l Airport, S. Korea