Google Maps does not provide walking directions in South Korea. It routes subways and buses normally, but pedestrian navigation down side streets in Seoul or Busan requires local apps like Naver Map or KakaoMap.
Atli is data-only. It does not provide a Korean phone number, SMS or cellular voice calls. KakaoTalk, WhatsApp, Telegram, iMessage, FaceTime, maps and translation apps work through the data connection.
Atli eSIM plans for South Korea
| Data | Validity | Atli price | Good for |
|---|---|---|---|
| 1 GB | 7 days | $3.99 | A short stop or a layover |
| 3 GB | 30 days | $6.99 | About a week in Seoul |
| 5 GB | 30 days | $8.99 | One to two weeks including Busan or Jeju |
| 10 GB | 30 days | $15.99 | Longer trips with regular photo sharing |
| 20 GB | 30 days | $27.99 | Remote work, streaming or frequent hotspot use |
| Unlimited | 5 days | $13.99 | A short trip with heavy data use |
| Unlimited | 30 days | $67.99 | A month without tracking each gigabyte |
These prices were checked in August 2026. Plans and prices can change.
Korea is unusually well covered by free WiFi, in cafes, on the subway and in most public buildings, which normally takes pressure off a data plan. It does not here, for the reason in the next section but one: the navigation you depend on is live, and you use it constantly. Budget a little more than you would for a comparable city break elsewhere.
For a closer estimate, see how much data a trip really uses.
What network Atli uses in South Korea
Atli has one Korean partner network: KT on 2G, 3G, LTE and 5G.
SK Telecom is Korea’s largest operator and is not one of Atli’s partner networks. If you have read that an Atli eSIM connects to SK Telecom, that is wrong. Your phone will attach to KT.
There is also no second carrier to fall back on when KT is busy, unlike Germany or Norway where Atli has two. KT does carry the full stack though, 2G through 5G, which is more than most Atli destinations offer.
Why Google Maps will not walk you there
This is the part that catches first-time visitors, and it is the real reason to arrive with working data.
South Korea restricts the export of detailed national mapping data. It approved a request from Google on 27 February 2026 and attached conditions, and in August Google told the Korea Herald that turn-by-turn directions are part of its plan, but it gave no launch date. Until then Google Maps shows places, reviews and public transit routes but has no turn-by-turn driving or walking navigation, and the walking part of a transit route is drawn as a dotted line. This is not a signal problem and no eSIM fixes it: the data simply is not in the app.
What works instead is local:
- Naver Map and KakaoMap for walking, subway exits and bus arrivals, both with English interfaces
- Kakao T for taxis, which spares you explaining a destination in Korean
- Papago for menus and kiosk screens, which handles Korean better than general translators
All four are online services. That is the whole argument for buying data before you arrive rather than hoping for cafe WiFi: in Korea the map in your pocket does not work, and the one that does needs a connection.
Subway stations are large and exits are numbered, sometimes fifteen of them, and the right exit is the difference between arriving and walking a block underground the wrong way. That is what the data is for.
If you are choosing where to stay, compare the exact map pin with the nearest subway station on Booking.com. In Seoul the station matters more than the district, and a place two stops out on a direct line usually beats one that only looks central.
Keep your normal SIM for your phone number
On a compatible dual-SIM phone, your home SIM and Atli eSIM can have separate jobs: your own number stays on your home SIM for calls and texts, and mobile data in South Korea comes from your Atli eSIM.
On a dual-SIM phone, set Atli as the cellular-data line and keep your primary SIM active for calls and texts. Turn off data roaming on your primary SIM to avoid unintended roaming data charges. If your carrier supports roaming, verification texts can still arrive on your primary SIM.
Read the dual-SIM travel guide for the settings to check before departure.
South Korea-only plan or Asia regional plan?
Worth checking, because the two meet at the bottom of the range:
| Plan | South Korea only | Asia |
|---|---|---|
| 1 GB / 7 days | $3.99 | $3.99 |
| 3 GB / 30 days | $6.99 | $8.99 |
| 5 GB / 30 days | $8.99 | $17.99 |
| 10 GB / 30 days | $15.99 | $30.99 |
| 20 GB / 30 days | $27.99 | $40.99 |
At 1 GB the two cost exactly the same. That makes the regional plan the better buy at that size, for the simple reason that it is valid in ten places instead of one at identical money. If you are stopping over in Seoul for a couple of days, there is no argument for the local plan.
From 3 GB upward the Korean plan is cheaper, and the gap widens fast: nine dollars at 5 GB, fifteen at 10 GB. For a normal week or two, buy local.
The regional plan covers Bangladesh, Cambodia, China, Hong Kong, India, Japan, Macau, South Korea, Sri Lanka and Taiwan. Japan being on that list is what usually decides it, since Seoul with Tokyo or Osaka is the common pairing and stays on one plan.
See the regional eSIM guide if your itinerary crosses several countries.
Travel eSIM or local Korean SIM?
A travel eSIM is convenient when you want data arranged before arrival. A local product may suit a longer stay or anyone who needs a Korean number, though Korean postpaid service generally expects residency documentation rather than a passport.
KT, SK Telecom and LG U+ all sell prepaid and tourist products, and there are counters at Incheon. Those are separate local products rather than services supplied by Atli, and their terms and identification requirements change, so check the current offer before buying.
For a broader comparison, see eSIM vs airport SIM vs pocket WiFi.
How to set up an Atli eSIM for South Korea
Install the eSIM at home before you travel, while you still have reliable WiFi. Do not wait until you arrive: airport WiFi may be slow, require a login or fail when you need it. Check first that your phone supports eSIM and is carrier-unlocked.
Download Naver Map or KakaoMap at the same time. Both want an account for some features, and setting that up at home is easier than doing it at Incheon with a suitcase.
Installing the eSIM does not start the plan. It starts when your phone first connects to a network at the destination. You have up to 30 days after purchase to make that first connection; after that, the plan starts automatically.
After arrival:
- Turn on the Atli eSIM.
- Select Atli as the cellular-data line.
- Turn on data roaming for that line.
- Leave your home SIM off for mobile data if you want to avoid home-carrier roaming charges.
Keep the Atli eSIM installed after the data plan expires. You need only this one eSIM profile: if you buy another plan later, it is added to the same eSIM automatically. There is nothing new to install. Data plans expire; the eSIM itself stays on your phone. Do not delete its profile.
FAQ
Which network will my phone use in South Korea?
Does Atli use SK Telecom?
Why does Google Maps not give walking directions in Korea?
Should I buy the South Korea plan or the Asia one?
Does Atli include a Korean phone number?
Can I keep my normal phone number?
Does Atli get 5G in South Korea?
Will a South Korea plan work in Japan?
Can I use my phone as a hotspot?
Can I receive bank verification codes?
Do I need a new eSIM when I buy another plan?
Checked against Atli’s current prices and networks, August 2026. Google Maps in Korea checked against the Korea Herald, October 2026.
The Booking.com link above is an affiliate link. Booking through it costs you nothing extra and helps keep Atli running.
