Last updated: 22 October 2026
For most trips to South Korea, the best eSIM is a plan with a large fixed amount of data or a daily allowance, installed before you fly. We compared what five providers charge for a week and for two weeks, and what their unlimited plans give you at full speed. One honest catch up front: a travel eSIM gives you data, not a Korean phone number, and a few Korean apps and sites ask for one.
The short answer
- A week in Seoul and Busan: a fixed plan of 40 GB for 7 days covers maps, taxis, translation, messaging and photos with room to spare.
- Two weeks, or a trip that adds Jeju or Gyeongju: 60 GB for 15 days.
- Remote work, streaming, or sharing a laptop connection: an unlimited plan, and check how much it gives at full speed each day.
- A layover at Incheon: a one-day plan.
On every one of those trips, our Korea plans cost less than Airalo, Holafly, Nomad and Saily when we checked.
Prices compared
What each provider charged for South Korea on 22 October 2026, in US dollars:
| Provider | About 10 GB for a week | About 20 GB for two weeks | Unlimited, 7 days | Unlimited, 15 days |
|---|---|---|---|---|
| eSIM Lounge | 40 GB for 7 days: $12.99 | 60 GB for 15 days: $23.99 | $17.99 | $27.99 |
| Airalo | 10 GB for 7 days: $18.00 | 20 GB for 15 days: $29.00 | $26.00 | $49.00 |
| Holafly | Not sold | Not sold | $27.50 | $50.50 |
| Nomad | 10 GB for 30 days: $18.00 | 20 GB for 30 days: $28.00 | $25.00 | Not sold (10 days: $33.00) |
| Saily | 10 GB for 30 days: $18.99 | 20 GB for 30 days: $29.99 | Not sold (5 days: $18.99) | $48.99 |
Holafly's price from its own site. Airalo, Nomad and Saily from esimDB, because their own sites showed us euros. Airalo sells several Korea plan families: we list its cheapest for each column. Prices change often: the plan cards on our South Korea eSIM page always show our current prices.
We also sell a daily plan with 1.5 GB a day: $11.99 for 7 days (10.5 GB) or $22.99 for 15 days. The fixed plans above give more data for about the same money, so pick the daily plan only if you like a set allowance each day.
What "unlimited" really gives you
Every unlimited plan slows down after a certain amount of data each day. That threshold matters more than the headline price if you work online or stream:
- eSIM Lounge: full speed for the first 5 GB each day.
- Saily: 5 GB a day, then slowed until the next day (esimDB lists 1 kbps, which is effectively stopped).
- Airalo: 3 GB a day, then 1 Mbps.
- Nomad: 2 GB a day, then 1 Mbps.
- Holafly: no daily threshold published, and hotspot sharing is capped at 1 GB a day.
1 Mbps is enough for messaging and maps, not for video calls. See fixed, daily or unlimited for how each plan type behaves.
A Korean phone number: when you need one
A travel eSIM is data only. Your own number stays on your usual SIM for calls and texts from home, and WhatsApp, iMessage and KakaoTalk work over the eSIM's data. What it does not give you is a Korean 010 number, and some Korean services ask for one to verify you: some shopping, delivery and booking sites, and setting up some local payment or banking services. Most visitors never hit this. If you know you will need a Korean number, for example for a long stay or a local account, a tourist SIM or eSIM from one of the Korean carriers is the better choice.
The carriers' own tourist plans. KT, SK Telecom and LG U+ all sell prepaid SIMs and eSIMs for visitors, online and at counters in Incheon arrivals. Some plans include a Korean number for calls and texts after a passport check; data-only plans do not. We could not confirm their current prices on the carriers' own English pages, so check the carrier's site or counter before you rely on a price you read elsewhere. The trade-off is setup: a counter plan means queuing with your passport after a long flight, while a travel eSIM is installed at home and works when you land.
Apps to set up before you land
Maps: use Naver Map or KakaoMap. Google Maps shows places and public transport in Korea, but not proper walking or driving directions, because Korean law long kept detailed map data from leaving the country. The government conditionally approved Google's request to export map data on 27 February 2026, but as of 22 October 2026 we found no announcement that full walking and driving navigation has launched. Naver Map has an English mode and is what most visitors use.
Taxis: Kakao T, K.Ride or Uber. Kakao T is the app most Koreans use, but travel guides written in 2026 report that registering a foreign card in it does not always work. K.Ride, Kakao Mobility's app for visitors, and Uber, which books licensed taxis in Seoul, are reported to take international cards. Set up the app at home: sign-up codes sent by text go to your usual number.
Getting around: T-money. The T-money card pays for the subway and buses, and many taxis. Buy and top it up with cash at convenience stores and subway stations.
Translation: Papago (from Naver) or Google Translate. Download the Korean offline pack before you go.
Entry: K-ETA
South Korea's electronic travel authorization, K-ETA, is waived for visitors from 22 countries and territories, including the US, the UK and Australia, through 31 December 2026, under the Ministry of Justice's one-year extension announced in January 2026. You can still apply voluntarily, which spares you the paper arrival card, for a fee. For trips from 1 January 2027, nothing had been announced when we checked on 22 October 2026: check k-eta.go.kr, the official site, before you book, and use only that site.
eSIM or roaming from home
US carriers include Korea in their international roaming, at a price. When we checked on 10 and 11 October 2026:
- Verizon: TravelPass costs $12 a day per line, with 5 GB of high-speed data per 24-hour session. Two weeks is $168 for one line.
- AT&T: the International Day Pass costs $12 a day for one line, with at most 10 daily fees per line in one bill period.
- T-Mobile: Experience Beyond includes 15 GB of high-speed data abroad and Experience More 5 GB, then up to 256 kbps. Essentials has no data abroad without a pass.
Our guides to Verizon, AT&T and T-Mobile roaming have the details. UK and Australian carriers also charge a daily rate outside their included countries: check your own plan's rate for Korea, and see travel eSIM vs international roaming.
Coverage
South Korea has three mobile networks: SK Telecom, KT and LG U+. A travel eSIM joins one of them as a roaming partner. Coverage in Seoul, Busan and along the main rail lines is excellent, the subway included. Hiking trails in the national parks and parts of the coast can be patchier, so download offline maps in Naver Map before a day in the mountains.
Setting it up
- Check your phone supports eSIM and is unlocked: the 30-second check.
- Install the eSIM at home on Wi-Fi on the day you leave, before you fly: iPhone or Android. For most plans the days start when the eSIM first connects to a network in Korea, and each plan states its rule before you pay.
- When you land at Incheon or Gimpo, turn on data roaming for the eSIM line only and keep it off on your usual SIM. You can book a taxi or check the airport railroad before you reach the exit.
There are no top-ups yet: if you run out, buy a second plan and install it beside the first. A phone holds several eSIMs.
FAQ
What is the best eSIM for South Korea?
For most trips, a fixed plan with plenty of data: our 40 GB for 7 days costs $12.99, less than Airalo, Holafly, Nomad and Saily charged for 10 GB or for unlimited data when we checked on 22 October 2026. For remote work or streaming, pick an unlimited plan with a high full-speed allowance each day.
Does a Korea eSIM give me a Korean phone number?
No. A travel eSIM is data only, and your usual number stays on your main SIM. If you need a Korean 010 number to verify an app or a local account, buy a tourist SIM or eSIM with a number from KT, SK Telecom or LG U+.
Does Google Maps work in South Korea?
Only partly. It shows places and public transport, but not full walking or driving directions as of 22 October 2026. Use Naver Map or KakaoMap, and download offline maps before you go.
How much data do I need for a week in Korea?
About 1 GB a day for maps, taxis, translation, messaging and photos, so 7 to 10 GB for a week. Video calls, streaming and sharing your connection with a laptop use much more.
Is an eSIM better than a SIM card at Incheon airport?
For data, yes: you set it up at home, skip the queue in arrivals and keep your usual SIM in the phone. A carrier SIM bought at Incheon can include a Korean phone number, which a travel eSIM does not.
Do Americans need a K-ETA for South Korea?
Not for trips until 31 December 2026: the US, the UK and Australia are among the 22 countries and territories exempt until then. Nothing had been announced for 2027 as of 22 October 2026, so check k-eta.go.kr before you travel.
Facts checked on 22 October 2026: our plan prices on 22 October 2026; Holafly's price on its own site; Airalo, Nomad and Saily prices and daily limits on esimDB; the K-ETA exemption in the Korean Ministry of Justice extension notices published by Korean embassies (January 2026); the map data approval in TechCrunch (27 February 2026) and later travel guides; taxi apps in 2026 travel guides; US carrier rates from our Verizon, AT&T and T-Mobile guides (10 and 11 October 2026).