eSIM for South Korea: mobile data for Seoul, Busan and Jeju
Staying online in South Korea with a travel eSIM — some of the fastest networks in the world, which apps you will need, how much data a trip takes, and setting it up before you fly.
In short
- South Korea has some of the fastest mobile networks in the world; a travel eSIM uses a main Korean network with 4G and 5G.
- Local apps rule in Korea — maps, taxis and translation work best with mobile data all day.
- It is installed at home, so there is no SIM counter queue at Incheon after the flight.
- For a week in Seoul, 5–10 GB covers maps, translation, photos and social media for most travellers.
- Going on to Japan or China? A combined regional package covers them with one eSIM.
Contents
Seoul is a city of fast everything — subway, delivery, internet. Visitors quickly find that daily life runs on apps: Korean map apps for directions, taxi apps, translation for menus and signs. A travel eSIM keeps you connected from the airport train onwards, without a stop at a SIM counter.
Coverage and speed
South Korea's networks are among the fastest in the world. A travel eSIM for South Korea uses a main Korean network: Seoul, Busan, Incheon, Daegu and Jeju have fast 4G and wide 5G, including the subway and the high-speed KTX trains. Coverage reaches most of the countryside too.
The networks each package uses are listed on the South Korea page.
Apps worth installing before you go
- A Korean map app. International map apps have limited walking and driving directions in Korea; the local ones show subway exits, buses and walking routes.
- A translation app with the Korean language pack downloaded for offline use.
- A taxi app, so you can show the address instead of explaining it.
All of them need data — which is why a connection from the first hour matters.
How much data do you need?
| Trip | Typical use | Package |
|---|---|---|
| 3–5 days in Seoul | Maps, translation, messages | 3 GB |
| A week, Seoul and Busan | Plus photos, social media, some video | 5–10 GB |
| Two weeks or more | Video calls, sharing, streaming | 10–20 GB |
| Studying or working there | Laptop hotspot, video meetings | 20 GB or more |
South Korea with Japan or China
A regional package — Japan and South Korea, or China, Japan and South Korea — covers a combined trip with one eSIM. See the regions on the packages page.
Setting it up
- Check that your phone supports eSIM and is unlocked.
- Buy a package on the South Korea page; the QR code comes to your email and account.
- Install it at home over Wi-Fi — the install guide shows each step.
- When you land, turn on data roaming for the eSIM line and choose it for mobile data. Keep data roaming off on your own line.
Questions and answers
Do I get a Korean phone number?
No, a travel eSIM is data only. Some Korean services that verify identity by a local number will not accept it; tourist services usually work with your email or your own number.
Does it work on Jeju island?
Yes, Jeju is covered by the Korean networks like the mainland.
When do the package's days start?
When the eSIM first connects to a network in South Korea, not when you buy or install it.
See the packages for South Korea — the price is shown upfront, with nothing added later.
Ready for your trip?
An eSIM for 200 countries: set up in minutes, with no roaming bill.