Getting a SIM card in South Korea is straightforward for travelers, with options ranging from instant eSIMs to physical cards available at airports and convenience stores. As of April 2026, the market is highly competitive, offering extensive 4G/LTE and 5G coverage through three major carriers: SK Telecom (SKT), KT (Olleh), and LG U+.
Quick Comparison: Physical SIM vs. eSIM
| Feature | Physical SIM Card | eSIM (Digital) |
|---|---|---|
| Best For | Older phones, those needing a local number | Modern phones, instant connectivity |
| Purchase | Airport counters, convenience stores | Online apps (Airalo, Yesim, etc.) |
| Installation | Manual swap (easy to lose original SIM) | QR code scan (no hardware swap) |
| Local Number | Often included (010 number) | May be data-only; some offer numbers |
Where to Buy & Cost
- Airports (Incheon, Gimpo, Gimhae): The most convenient option. Major carriers have dedicated booths in the arrival halls. Staff usually speak English and will help install the SIM.
- Convenience Stores: You can find prepaid SIMs at CU, 7-Eleven, and GS25 locations nationwide. These are often slightly cheaper but might have a more limited selection.
- Price Range: Expect to pay between $5 for 1 day to $65 for 30 days for unlimited data plans.
Key Requirements & Tips
- Unlocked Phone: Your phone must be carrier-unlocked to accept a Korean SIM.
- Passport: You must present your physical passport for registration when buying or picking up a SIM.
- Local Phone Number: Essential if you plan to use local apps like KakaoT (taxi) or make dinner reservations, as many require a Korean “+82” (010) number for verification.
- T-Money Integration: Some physical SIM bundles from LG U+ include a free T-Money card, which you can use for subways, buses, and small purchases at convenience stores.
Top Recommended Providers
- SK Telecom (SKT): Known for the best nationwide coverage and signal stability in subways and trains.
- KT (Olleh): Offers the most widespread public Wi-Fi network access for subscribers.
- Chingu Mobile: A popular “budget” choice (MVNO) for mid-term to long-term stays (over 30 days).
- Airalo / Yesim: Excellent for data-only eSIMs if you don’t need a local phone number.