KSIM (Call & Data)

Call & Text & Data Available



This service requires reservation.

Passport, credit card and reservation number are required for rental.

If you do not have a credit card, please use KSIM (Data Only)

KSIM(Data Only)also can use free voice call by Mobile Messaging Apps.

Please read the contents on this page carefully.



4G LTE Unlimited Data
Flat-rate plan by rental period

Voice Call

Incoming Call : FREE
Outgoing : Pay when you Return

Data Charge

Pay when you Pick Up.
Rental period is per date, Not 24 hours.

Rental Period Data Charge
5 days ₩ 27,500
10 days ₩ 38,500
30 days ₩ 71,500

Voice Call Charge

Auto payment by credit card

Local Call Voice ₩ 264 / 1 min.
SMS ₩ 110
International Call We will notify you when you Pick Up

The Best Prepaid SIM Card in Korea
No-Contract Prepaid Cell Phone Plans!
Pay at the airport and use it immediately.
Unlimited 4G LTE Data & Data Sharing!
Enjoy Free voice call by WhatsApp, Skype…
Customer support by WhatsApp, LINE etc.


Use your own phone with KSIM
Unlocked SIM Free Smartphone ONLY !
Contact your telecom company to unlock.
If you do not have a SIM Free phone,
please use smartphone rental option.

4G Bands (FDD-LTE)
Main:LTE 1800Mhz (Band3)
Sub:LTE 2100 (B1), LTE 900 (B8)
3G Band (WCDMA / UMTS)
★Devices that do not support LTE frequencies : 3G ONLY
★Dedicated device (CDMA or TD-SCDMA) : Can NOT use in Korea


Mobile authentication / RingBack Tone
Roaming / Collect Call / Optional Services

Simple reservation!
 Submit the rental application below.
 After submit, confirm your email.
 Then you will receive a Reservation Completion mail.


Submit your order after flight schedule is confirmed.
It can be submitted max 180 days ahead.
Cut-off date : 1 day before Pick-Up, by 2pm.
Please Contact ☏Support after Cut-off date.


To cancel or change your reservation
Please contact the reservation completion mail Reply.
Do NOT cancel or change without contact.
“Manner maketh man”

Location of Reception Desk
Please check the Location below.
It may takes about 30 mins for line waiting and phone setting.


Must be Prepared for Pick-Up
① Reservation Completion mail
② Passport of the booked customer
③ Credit Card of the booked customer
④ Pay for Data charge by Card or Cash(₩)
Your Passport Name = Credit Card Name!
Credit Card : Pay fro call charge Deposit.
When the sim card expires, credit card will pay the call charge
Debit Card and Cash are not available to use as deposit

Pay for Call & SMS Charge
Expiry day is according to your departure schedule
Auto payment by your open credit card


If you want to change expiry day
Please contact us by replying the Reservation Completion Mail at least 1 day before.
SIM Card will expires on time without contact.

Please contact us by replying the Reservation Completion Mail Reply at least 1 day before.
Extension fee only can be paid by your card.
SIM Card will expires on time without contact.

Customer Support
Business Hour:Weekday 09:00 ~ 18:00
Lunch Time : 12:00 ~ 13:00
+82 10-4485-7003 ( WhatsApp, LINE etc.)
☏ +82 70-7090-7007 (Korean)
☏ +82 70-7090-7008 (English/Chinese)
☏ +82 70-7090-7009 (Japanese)


Please contact us if you have any problem.
During non-office hours, will be responded on the next business day.

Always Reservation Customer FIRST !
Please make a reservation in advance.
WhatsApp・LINE・Kakao Customer Support only can use Reservation Customer.


Check your device is available to use KSIM
①SIM Free device from purchase.
②Device that already confirmed unlock service by your telecom company.


What kind of device can not use KSIM
Device is locked by your telecom company.
Device that do not support KSIM frequencies.
Device that is registered by other SIM Card.
Device that is stolen or lost in Korea.
Device is produced by LG U+ before 2014/Oct


Devices that have used other SIM card in Korea
To cancel that old number before using KSIM,
Please let us know the IMEI number of your device after Apply.
How to Find IMEI Number


Unlocked(SIM FREE) WiFi Hotspots
It is available ONLY when you Pick Up at Myeong-dong office.


If your device is not available to use KSIM
Please use ☞ Mobile WiFi Hotspot Rental


Device change is not permitted.
After setting, please do not change the SIM card to other devices.
If you need to use many devices, please use ☞ Mobile WiFi Hotspot Rental



Incheon Airport

Open 365 days・24 hours
☞ Reception Desk

Gimpo Airport (Seoul)

Open 365 days・06:30 ~ 23:00
☞ Reception Desk

Myeong-dong Office (Seoul)

Weekday・09:00 ~ 18:00
Lunch time : 12:00 ~ 13:00

☞ Location
☞ Public Holidays

Gimhae Airport (Busan)

Open 365 days
Rental : 06:00 ~ 22:00
Return : 06:00 ~ 21:40
☞ Reception Desk

Jeju Airport (Jeju island)

Open 365 days・09:00 ~ 19:00
☞ Reception Desk

Busan Port

Open 365 days・06:30 ~ 19:30
☞ Reception Desk

☆ Please read this page carefully before submit your oder ☆

☆ Submit order = agreed with all contents on this page ☆