2018 Guide to Korea Prepaid SIM Cards and Wifi Router at ICN

Update: check out our updated 2019 guide to SIMs and wifi routers at Incheon here

Most everyone flies into Seoul Incheon (ICN) airport when visiting Korea. It’s pretty straightforward though you might need to wait in line to buy one. The counters can get very busy. We’ve updated our guide as of May 2018 (comments welcome below to keep things up to date). The same companies offer the same rates at Gimpo airport and other ports of entry such as Incheon and Busan.

Prices are not cheap. Aside from getting the card at the airport, you can get a 7 day 3 6,6GB data SIM card mailed to you before you go to Korea from HKSIMCard. It’s a little cheaper than buying at the airport in Korea.

  • kt is the only company there offering prepaid SIM in the arrival hall.
  • LG U+ offers mobile wifi routers and phones, and data SIM cards for iPhones.
  • SK Telecom/T Roaming offers wifi routers and phones and SIM card rental.

kt – Korea Telecom

kt offers a few different options; SIM card, wifi router egg, and phone. Won’t be covering phones here, if you need one check the kt site.

KT has booths in terminal one (gate 6-7, 1st floor (24 hours), gate 10-11, 1st floor (6 a.m. – 10 p.m.) and gate 4-5, 1st floor for wifi eggs only (7 a.m. – 10 p.m.)) and terminal two (gate 2-3, 1st floor (24 hours) and in front of Paris Baguette, 1st floor for wifi eggs only (7 a.m. – 10 p.m.))

Prepaid SIM (voice support) or Data only Prepaid SIM details are as follow:

KindsPeriod of use
27,500 won5days
38,500 won10days
71,500 won30days

The rates are a bit high in my opinion from kt. You can also get a sim card mailed to you, so you have it when you land in Korea, from HKSIMCard. 3GB of 4G data SIM card, valid for 7 days for $26.95 US.

Data Rates

Data RatesCharges to Receive
Charges for Making
Calls/Sending Texts
UnrestrictedFree.International Rates

I recommend the data prepaid SIM. It’s unlimited data, and if you need to make voice calls you can simply use Skype, WhatsApp, or another data based voip program. Then you won’t be charged a separate calling rate. You also don’t need to return the data prepaid SIM.

But if you do want a SIM card that supports voice, rates for calling are:

General Rates

(※ Vat is included.)

Charges for Making Calls/Sending TextsRates
CallDomestic264 won/1 minCharge paid for voice/text services after returning the SIM Card
InternationalInternational Rates – 79 won/minute to Hong Kong
SMSDomestic110 won/case
International330 won/case

I assume you need to leave a credit card if you get a prepaid SIM with voice since they’ll charge you for usage upon card return, bit of a hassle to return the card IMO.

Wifi Egg Router

I don’t like using wifi routers since you can hotspot using any smartphone these days, so basically you’re carrying an extra device around if you choose the router option. You also need to pay a rental fee on top of the usage fee, and return the router after you’re done. Here is the fee breakdown:

Data Rates5,500 won /day
Data unrestricted
Rental fee1-10 days3,300 won / day
11-20 days2,200 won / day
21 days –1,100 won / day

Egg battery lasts up to ten hours.

lg U+ LTE router rental

LG has SIM cards, routers and phone rental. Little cheaper than kt

Data SIM rates

LG U+ data SIM cards are only available for iPhones. Data use is unlimited.

KindsPeriod of use
27,500 won5 days
38,500 won10 days
60,500 won20 days
71,500 won30 days
99,000 won40 days

Wifi Router

Daily rental fee: 3,300 won/day (if the rental period is 5 days of longer, rental fees are free from 5th day onwards.)

Daily data service chage: 5,500 won/day for unlimited usage.

Note that unlike its competitors, the leaflet below excludes VAT which adds 10%.

SK Telecom 

SK Telecom offers SIMs and routers as well as phones. They offer a one day rate which may suit well for a flying visit.

SK Telecom/T Roaming has booths in terminal one (gate 10-11, 1st floor (6 a.m. – 10 p.m.) and gate 6-7, 1st floor (24 hours)).

WiFi Router Rate

3,300 won per day.

Data Rates5,500 won /day
Rental feeDays 1 – 63,300 won / day
Day 7 onwards0 won/day

Data SIM Rates

This allows 1GB of data daily. Additional use is advertised at 5 won/0.5KB though this seems prohibitive so it may be per 0.5 MB. In any case we suggest you clarify with SK Telecom before usage.

KindsPeriod of use
6,600 won1 day
27,500 won5 days
38,500 won10 days


SIM card rental

SK Telecom also offers SIM card rental which works for unlocked phones.

Rental is free (but requires a 10,000 won deposit) and incoming calls and SMS are free, which is a good deal. You can call locally for 11 won/minute and send SMS messages locally for 110 won each. International calls are costlier.

By the way, if you have a long layover, you can get a Seoul free transit tour sponsored by the airport.

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