South Korea eSIM at a glance
South Korea eSIM plans start at €2.80 for 500MB over a day and reach €55.99 for unlimited data over 30 days. Coverage uses SK Telecom, KT, and LG U+. 5G is everywhere in Seoul, Busan, Incheon, Daegu, and Daejeon, and Korean 5G is among the fastest in the world. 4G LTE is nationwide including Jeju Island and the rural inland routes. Activation takes about 90 seconds.
Networks
SK Telecom, KT, LG U+ (4G / 5G)
Activation
Under 90 seconds via QR
Currency
KRW (₩)
Capital
Seoul
Plug type
Type C / Type F (220V)
Best time
April to June for cherry blossom (early April in Seoul), and September to November for autumn foliage. Korean summers (July to August) are humid and stormy. Winter is cold but dry and Seoul looks beautiful with snow.
South Korea eSIM plans
Most-picked plans for South Korea. Prices adjusted for local network costs. All plans include hotspot and tethering.
How a South Korea eSIM compares
Carrier roaming
~€12/day
≈ €168 for 2 weeks
Typical international roaming charge from major EU/UK/US carriers in South Korea. Caps often activate after €60/month and throttle to dial-up speeds.
Local SIM at airport
€15 to €40
one-time plus setup hassle
KT and SK tourist SIMs at Incheon Airport cost €20 to €40 a week. Activation needs a passport and a Korean phone-number-linked verification, which is awkward for first-time visitors.
RoamingFlex eSIM
€8.95
3GB / 15 days
Same plan covers 2 weeks of travel in South Korea. QR code in under 90 seconds. No app, no airport queue, no passport scan.
How much data you actually need in South Korea
Tourists in South Korea average 410MB/day. South Korea tourist data averages 380 to 450 MB per day. Naver Maps and KakaoMap both work better than Google Maps in Korea (Google Maps doesn't have driving navigation for foreigners due to Korean data export rules). KakaoTaxi for rides, Kakao Talk for messaging. Most Koreans use Kakao for everything. Source: RoamingFlex 22-destination data usage dataset (CC BY 4.0).
Insider tip
Download KakaoMap before you arrive. Google Maps in Korea has no driving directions (it can show you bus and walking routes only) because of a 2007 data export restriction. KakaoMap and Naver Maps have full navigation, but KakaoMap has the better English interface for tourists.
How to activate your South Korea eSIM
- 1
Buy a South Korea plan
Pick a plan above based on your trip length. Pay by card or wallet. Checkout takes under a minute.
- 2
Receive your QR code
You'll see the QR code on screen the moment payment clears and get a copy by email within 2 minutes.
- 3
Open your phone's eSIM settings
iPhone: Settings, then Mobile Data, then Add eSIM, then Scan QR. Android: Settings, then Network, then Add Mobile Plan or SIM, then Scan QR.
- 4
Land in South Korea and turn on data roaming
Turn on data roaming for the new eSIM line (this is local data, not international roaming. The toggle is just how the OS routes traffic). You'll be online within 60 seconds of arrival.
South Korea eSIM frequently asked questions
Why doesn't Google Maps work for driving directions in Korea?
Korean law restricts the export of detailed mapping data, so Google Maps shows only walking and public transit options for foreigners. Use KakaoMap or Naver Maps instead. Both have full driving navigation and work normally on the RoamingFlex eSIM.
Does the eSIM work on the Seoul Subway?
Yes. Korean subway coverage is excellent. SK Telecom and KT both have full signal in tunnels (unusual globally), and 5G works in many stations. The Wi-Fi on subway trains is also free if you prefer it.
Will it cover the KTX high-speed trains?
Yes. KTX coverage along the Seoul-Busan, Seoul-Mokpo, and Seoul-Gangneung corridors is reliable. 5G handoffs happen near major stations. Tunnel sections briefly drop to 4G or nothing.
How much data do I need for a week in Korea?
5GB is the comfortable answer. Korean apps are data-heavy and the cultural default is to be online constantly. 3GB only works if you really lean on hotel WiFi.
Does it work on Jeju Island?
Yes. Jeju has full 4G LTE across the island including the volcano (Hallasan) trail starts and the coastal scenic routes. 5G is live in Jeju City.
Will the eSIM work near the DMZ on a tour?
Coverage in the DMZ tour zones (Imjingak, Dora Observatory) is reliable. The actual JSA area has signal restrictions and your tour guide will tell you when to put the phone away.
More Asia destinations
Ready to travel South Korea with mobile data?
QR code in 90 seconds. No app. No carrier shop.
Last updated 23 May 2026. Operated by Vektor Utility Holdings Limited (UK company 17174994).