SIM, eSIM & internet in Korea
Korea has some of the fastest mobile internet in the world, and getting connected as a visitor is easy — if you pick the right option for your situation. Here's the comparison nobody explains properly.
The three options, honestly compared
- eSIM (best for most people) — buy online before you fly, scan a QR, and you land connected. No booth queues, keep your home SIM in for texts. Requires an eSIM-capable phone (most recent iPhones/Galaxies/Pixels). Data-focused plans are cheap.
- Physical tourist SIM — pick up at the airport booths (telecom counters are in the arrivals hall) or buy online for airport pickup. Best if your phone doesn't do eSIM, or you want a Korean phone number included.
- Pocket WiFi (egg) — a rented hotspot. Only makes sense for groups sharing one device or laptop-heavy travelers; otherwise it's one more thing to charge and return.
⚠️ The catch: SMS verification
Many Korean apps and services (taxi apps, deliveries, some bookings, waitlists) verify identity with an SMS code sent to a Korean number. Cheap data-only eSIMs can't receive these.
- Short tourist trip: data-only is usually fine — Kakao T taxis can work with foreign cards without a Korean number, and maps/translation need only data.
- Staying weeks or living here: get a plan that includes a Korean phone number (010-...) — it unlocks the whole app ecosystem. Long-term residents move to a regular carrier or budget MVNO ("알뜰폰") plan after getting their ARC.
Free WiFi: genuinely everywhere
Cafes, subways, buses, convenience stores — free WiFi coverage in cities is excellent, including public "Seoul WiFi" networks. It's a real backup, but don't plan around it: you want data while walking between places, which is exactly when maps and translation matter. And treat public WiFi like public WiFi — fine for maps, not ideal for banking.
Practical tips
- Landing late? Airport telecom booths have long hours but can queue after midnight arrivals — eSIM avoids this entirely.
- Compare plans by days + data, not price alone. "Unlimited" plans often throttle after a daily cap — fine for maps, noticeable for video.
- Tether freely: Korean tourist plans generally allow hotspot use, so one good plan can cover your laptop.
- Keep your home SIM active (in a dual-SIM setup) for bank OTP texts from home.
Next: Shopping & tax refund →