You can travel Korea on almost no Korean. You cannot travel it without data, because the tools that replace the language — maps, translation, tickets, transport times — are all online.
Get data before you need it
eSIM is the least friction if your phone supports it. Buy it before you fly, activate it on landing, and skip the counter entirely. Data-only plans are cheap and cover a week or two comfortably.
A physical tourist SIM from an airport counter costs about the same and takes fifteen minutes of queueing. The counters are on the arrivals floor at Incheon and Gimpo and staff speak English.
Pocket wifi is a third option and only makes sense for a group sharing one device, or for someone whose phone is locked to a carrier.
Roaming from home works and is usually the most expensive of the four, but it is the only one that keeps your own number live. If you are here for three days and someone needs to reach you on your normal number, it is a defensible choice.
The one reason to want a Korean number
Verification texts. Some Korean booking sites, ticket sales, delivery apps and taxi apps send a code to a Korean mobile number and cannot proceed without one. A data-only eSIM has no number and fails at that step.
If your trip is festivals, trains and food, you will rarely hit this — Korail’s English site, station machines, T-money and cash cover almost everything. If you plan to book through a Korean-only service, or to use KakaoTaxi, get a plan that includes a number.
Be aware that even with a Korean number, some services require a Korean identity verification that tourists cannot complete. That is a wall rather than an inconvenience, and the workaround is usually to book at a counter instead.
Maps: the thing nobody warns you about
Google Maps will find a place in Korea and mostly will not get you to it. Korean law restricts the export of detailed mapping data, so walking navigation and driving navigation are limited or absent. Transit directions are patchy and often wrong about buses.
Install Naver Map or Kakao Map before you travel. Both have English interfaces, both do transit directions properly, and both know the local bus that Google does not. Naver Map is the one most people use for public transport; Kakao Map has a slightly cleaner English interface. Either is fine, and there is no need for both.
Two practical notes on searching:
English search works for major places — stations, airports, well-known landmarks, big festivals.
For a small festival ground, search the Korean name. Copy it from the festival page rather than typing it, because a transliteration that looks right often returns nothing. Every festival page on this site carries the Korean title for exactly this.
Addresses in Korea are road-name addresses and they work well in Korean map apps. Showing an address on your phone screen to a taxi driver is a completely normal thing to do and works better than pronouncing it.
The other apps worth the space
- Papago for translation. It handles Korean better than the general-purpose translators, and its camera mode reads menu boards and signs. Download the offline Korean pack before you leave a wifi connection.
- Korail if you are taking KTX — booking, changes, and the ticket itself. The English mode accepts foreign cards.
- KakaoTaxi for taxis in cities where hailing is hard. It needs a phone number to register, which is the main argument for a SIM with a number.
- A weather app that shows hourly forecasts and fine dust. The Korean ones report fine dust as a headline number, which the international apps often bury.
- Your bank’s app, working, before you land. A blocked card in a country where many stalls are cash-only is a bad afternoon.
At the festival itself
A crowded festival ground is where mobile data goes to die. Several thousand phones on one rural cell tower means slow or absent signal at exactly the moment you want the map, the ticket or the bus time.
Public wifi exists in Korean cities and is genuinely widespread — cafés, stations, buses, and city-run hotspots. On a temporary festival site it is either absent or saturated. Do not plan around it.
Three minutes of preparation removes the most common bad hour of a festival day:
- Save the map area offline in Naver Map or Kakao Map, or at minimum screenshot the route from the station to the ground.
- Screenshot your ticket, seat number and QR code. A code that will not load at the gate is the worst possible five minutes.
- Write down the last bus or train time somewhere that does not need a connection — a note app, a photo, a piece of paper.
Add a fourth if you are travelling with someone: agree a meeting point before you go in. Finding each other by phone on a full festival ground does not work, and “by the main stage” is not specific enough when the main stage has four sides.
Wifi, and where it actually is
Korea has more public wifi than almost anywhere. Cafés, convenience stores, restaurants, subway stations, city buses, libraries and government buildings all carry it, and much of it is free and open.
Two things to know. Open networks named after a carrier often require a Korean subscription to log in — they appear in the list and then refuse you. And a network that is open is genuinely open, which means it is not a place to check your bank.
The practical shape of it: wifi is abundant everywhere you are sitting down and absent everywhere you are standing outdoors. That is the opposite of where you need it on a festival day, which is why the mobile data matters.
Numbers worth having offline
Save these in your phone before you travel, because you will want them at the moment you have no way to look anything up.
- 1330 — the Korea Travel Helpline. Free, 24 hours, English and several other languages. They will translate a phone call, tell you whether a festival is still on, and explain a bus timetable. It is the single most useful number in Korea for a visitor.
- 112 — police. 119 — fire and ambulance. Both handle English calls, and 119 will connect an interpreter.
- Your embassy, which is the number nobody saves and occasionally needs.
- Your accommodation’s address in Korean, screenshotted. A taxi driver reading it from your screen solves the problem instantly.
Power
Your phone will be the map, the ticket, the translator and the camera all day, on a cold evening, hunting for signal. That is the fastest possible way to flatten a battery.
Carry a power bank. Korea uses the European-style two-round-pin plug at 220V, so bring the right adapter — convenience stores sell them, but not always near a rural festival ground.
Charging lockers and paid charging stations exist at large events and are not something to count on.
What actually goes wrong
Not the technology. The sequence.
The common failure is arriving in Korea with no data, planning to sort it out later, and then needing a map before that happens. The second most common is a data-only eSIM meeting a service that demands a Korean number, discovered at the payment screen rather than before.
Both are solved before you fly: decide whether you need a Korean number, buy accordingly, and install Naver Map, Papago and anything else while you still have a connection you trust.
Questions worth asking
Why does Google Maps not give me directions in Korea?
Korean law restricts export of detailed mapping data, so Google Maps has limited walking and driving navigation here. Naver Map or Kakao Map work properly and both have English modes.
Do I need a Korean SIM or is eSIM enough?
An eSIM is enough for data, and you can activate it before you land. A physical SIM with a Korean number is only needed if you must receive Korean verification texts.
Is public wifi reliable at festivals?
No. Assume no usable signal on a crowded festival ground and download your route and tickets in advance.
Can I use my own number for Korean app sign-ups?
Often not. Many Korean services verify with a code sent to a Korean mobile number, and a foreign number is rejected outright at that step.
LAST UPDATED · Sep 8, 2026