This guide is based on firsthand experience and official Korean telecom sources. Last updated: July 2026.
You can get a SIM card in Korea at the airport in about 5–10 minutes, right after you clear immigration and collect your bags. In this guide, you’ll learn exactly where the counters are at Incheon and Gimpo airports, how much a SIM card costs, what documents you need, and how to decide between a physical SIM and an eSIM before you land.
Table of Contents
- How to Get a SIM Card in Korea at the Airport: Quick Answer
- Where to Find SIM Card Counters at Incheon International Airport (ICN)
- Where to Find SIM Card Counters at Gimpo International Airport (GMP)
- Which Carrier Should You Choose: KT, SKT, or LG U+?
- How Much Does an Airport SIM Card Cost?
- Step-by-Step: How to Buy and Activate Your SIM Card
- Physical SIM or eSIM: Which Should You Pick?
- What to Do If You Land Outside Airport Business Hours
- Frequently Asked Questions
- Final Thoughts
How to Get a SIM Card in Korea at the Airport: Quick Answer
All three major Korean carriers — KT, SK Telecom (SKT), and LG U+ — run counters in the arrival halls of both Incheon and Gimpo airports. You just walk up, show your passport, pick a data plan, and staff install and activate the SIM for you on the spot.
What You’ll Need Before You Arrive
- An unlocked phone (check with your home carrier before you fly)
- Your passport for identity verification
- Cash (KRW) or an international credit card
What Every Airport SIM Plan Includes
Every tourist SIM sold at the airport comes with unlimited data for your chosen number of days, usually 3 to 30 days, with longer plans up to 90 days available from KT and LG U+. Voice and text are optional add-ons on most plans.
💡 Pro Tip: If you only need maps, messaging apps, and basic browsing, skip the voice add-on. It saves you 5,000–7,000 KRW per trip.
Where to Find SIM Card Counters at Incheon International Airport (ICN)
When many expats first arrive in Korea through Incheon, they expect to search hard for a SIM counter. You don’t need to — the booths are impossible to miss right at the arrival exits.
Terminal 1
KT, SKT, and LG U+ counters sit near arrival exits 6, 7, 10, and 11, opposite the customs exit. A 24-hour counter near Exit 13 covers all three carriers for late-night arrivals.
Terminal 2
The same three carriers operate counters in the T2 arrival hall, with a round-the-clock desk available for red-eye flights. GS25, CU, and 7-Eleven stores in both terminals also stock basic SKT and KT SIM cards if the counters are busy.
| Terminal | Carriers Present | 24-Hour Option |
|---|---|---|
| Terminal 1 | KT, SKT, LG U+ | Yes, near Exit 13 |
| Terminal 2 | KT, SKT, LG U+ | Yes, near Gate 3 |
Where to Find SIM Card Counters at Gimpo International Airport (GMP)
Gimpo is smaller than Incheon, mainly serving domestic and select regional international routes from Tokyo, Taipei, and Shanghai. If you land here, the process is nearly identical.
Where the Booths Are
Walk out of the arrivals hall toward Gate 1. KT, SKT, and LG U+ booths sit on the right-hand side, easily visible once you clear customs.
Opening Hours to Know
KT’s Gimpo counter runs 6:30 AM to 11:00 PM. SKT and LG U+ counters typically extend into late evening, but hours can shift, so confirm before you land if your flight arrives very late.
⚠️ Important: If your flight lands outside these hours, you may need to wait until morning or pick up a pre-ordered SIM elsewhere. Always confirm current hours with the carrier before your trip.
Which Carrier Should You Choose: KT, SKT, or LG U+?
A common mistake foreigners make is picking whichever counter has the shortest line without comparing speed or restrictions. Here’s what actually differs between the three.
KT (Olleh)
KT is the most widely recommended tourist SIM. It offers full-speed data without the throttling caps some competitors apply, plus optional call and text add-ons.
SK Telecom (SKT)
SKT is Korea’s largest carrier by subscribers and offers the widest network coverage, but most tourist plans cap speed around 10 Mbps — fine for maps and messaging, slower for streaming.
LG U+
LG U+ typically gives you several gigabytes of unrestricted high-speed data per day before throttling, and its counters are often less crowded.
| Carrier | Speed Behavior | Best For |
|---|---|---|
| KT | Full speed, no early throttle | Heavy data users, calls/texts |
| SKT | Capped around 10 Mbps on tourist plans | Widest coverage, casual use |
| LG U+ | High-speed daily allowance, then throttled | Shorter queues, T-Money bundle |
💡 Pro Tip: If you also want a T-Money transit card, LG U+ sells a combo SIM with a T-Money card built in for stays of 3 days or more.
How Much Does an Airport SIM Card Cost?
Airport counters are convenient but priced higher than city stores or online pre-orders. Expect to pay a premium for the convenience of same-day pickup.
Typical Price Ranges
- 1–3 day data-only plans: roughly 10,000–20,000 KRW
- 7–10 day plans: roughly 25,000–45,000 KRW
- 30-day plans: roughly 50,000–90,000 KRW, higher with voice and text
Prices and promotions change often, so confirm the latest details at the carrier’s official site before you travel.
Booking a plan online in advance and picking it up at the counter is usually cheaper than buying on the spot. If you know your travel dates, this is worth doing before you fly.
Check KT Tourist SIM PricesStep-by-Step: How to Buy and Activate Your SIM Card
The process is the same at every counter, whether you’re at Incheon or Gimpo.
- Step 1: Clear immigration and collect your luggage.
- Step 2: Walk to the arrival hall and find the KT, SKT, or LG U+ counter.
- Step 3: Tell staff how many days you need and whether you want calls and texts.
- Step 4: Hand over your passport for identity verification.
- Step 5: Pay by cash or card, then let staff insert and activate the SIM.
- Step 6: Test your data connection before leaving the counter.
⚠️ Important: Korean law requires passport registration for every SIM card sold to a foreigner. No counter can sell you a SIM without it, so always carry your passport, not just a photo of it.
Physical SIM or eSIM: Which Should You Pick?
If your phone supports eSIM, you can skip the counter entirely and activate a plan before you even board your flight.
When a Physical SIM Makes Sense
Choose a physical SIM if your device doesn’t support eSIM, or if you want a Korean phone number with call and text credit added on arrival.
When an eSIM Makes Sense
An eSIM is faster to activate, avoids counter queues, and works well if you only need data. Just download the profile ahead of time and activate it after landing.
Compare LG U+ SIM and eSIM OptionsWhat to Do If You Land Outside Airport Business Hours
KT’s counters typically close overnight, though 24-hour counters exist near specific exits at both Incheon and Gimpo, covering all three carriers.
Your Backup Options
- Use the 24-hour counter location at your terminal
- Buy a basic SIM from an open convenience store (GS25, CU, 7-Eleven)
- Activate a pre-purchased eSIM using airport Wi-Fi
💡 Pro Tip: If your flight lands very late or very early, set up an eSIM before departure. You’ll have data the moment you land, no counter required.
Frequently Asked Questions
Can I buy a SIM card at the airport without a reservation?
Yes. Walk-up purchases are available at all three carrier counters at both airports. Pre-ordering online can save money and time if you already know your travel dates.
Do I need an Alien Registration Card (ARC) to buy an airport SIM?
No. Tourist SIM plans only require your passport. An ARC is only needed later if you register for a long-term postpaid plan as a resident.
Can I use my home phone plan instead of buying a Korean SIM?
You can, but international roaming charges are usually far more expensive than a local prepaid SIM, especially for data-heavy use like navigation and video calls.
Will an airport SIM work outside Seoul?
Yes. All three carriers offer nationwide coverage, so your SIM will work in Busan, Jeju, and other regions without any extra setup.
Can I top up my SIM if I run out of data?
KT and LG U+ let you top up call and text credit at their stores or online. Data validity is usually set for your purchased number of days rather than a data cap.
Is it cheaper to buy a SIM in the city instead of the airport?
Generally yes. City stores and online pre-orders are often 10–30% cheaper than airport counters, but they take more time and may involve more paperwork.
What happens to my Korean phone number after my SIM expires?
The number is deactivated and eventually recycled. If you plan to return to Korea, some carriers let you extend your plan online before it expires.
Final Thoughts
Getting a SIM card in Korea at the airport is one of the simplest parts of arriving in the country. Bring your passport, pick a carrier based on your speed and budget needs, and expect the whole process to take under 10 minutes at either Incheon or Gimpo. If you’re staying longer term, it’s worth comparing airport prices against postpaid plans once you settle in.