eSIM for South Korea

Buy a prepaid travel eSIM for South Korea and pay in cryptocurrency. You get local 4G/5G data on partner networks without a contract or a local address. No documents, no account and no email: you pay in crypto and the QR code appears on the page.

Part of our Asia plan.

Buying an eSIM for South Korea

Pick a plan that covers South Korea — a single-country plan is cheapest per gigabyte, a regional plan pays off the moment you cross a border.
Pay with USDT, BTC, ETH, SOL, TON or XMR. No email address, no account, no card.
Scan the QR that appears on the page. Do this at home over Wi-Fi rather than on airport Wi-Fi after landing.
On arrival, set the eSIM as your data line and turn data roaming ON for it. This is the single most common reason a correctly installed profile shows no data in South Korea.

Coverage and network quality in South Korea

Among the fastest and most complete networks anywhere — 5G in the subway, in tunnels and on the KTX.

Mobile data in South Korea: fast networks, different maps

Korea has three networks: SK Telecom, KT and LG U+. All of them are among the fastest in the world, with dense 5G in Seoul and Busan and full coverage in the subway. Even mountain trails near Seoul usually have signal.

The surprise for visitors is maps. Google Maps has long been limited in Korea, especially for walking and driving directions, so locals use Naver Map and KakaoMap. Both work fine on a travel eSIM and have English interfaces. Download one before you land.

The second surprise is phone numbers. Some Korean apps still ask for a Korean number to verify you. We don't sell Korean numbers, and a data eSIM won't solve that part, so book taxis and restaurants through apps that accept foreign numbers or through your hotel.

T-money cards for the subway are topped up with cash at stations and convenience stores, so the eSIM is mostly for maps, translation (Papago is the local favorite) and messaging.

Korean data is mid-priced in our catalog, and a fast network means video calls and uploads go through without waiting.

Which plan to pick for South Korea

A week in Seoul: 3 GB.
Two weeks including Busan and Jeju: 10 GB for 30 days, or unlimited.
Korea plus Japan: the Southeast Asia and Asia plans cover both countries on one eSIM.

South Korea eSIM plans and prices

Data and validity	Price	Price per GB
1 GB · 7 days	$2.80	$2.80
5 GB · 15 days	$13.36	$2.67
10 GB · 30 days	$18.80	$1.88
Unlimited · 7 days	$74.71	—

South Korea is also covered by these plans: Asia, Southeast Asia, World, World Lite.

eSIM vs roaming vs a local SIM in South Korea

Roaming on your home plan is the expensive default — typically $10–15 a day, billed per day whether you use it or not.
A local prepaid SIM is cheap but costs you an hour on arrival, usually an ID, and a phone number you will not keep. In South Korea, that trade only makes sense on a long stay.
A travel eSIM sits in between: local-network speeds, no shop visit, no paperwork, and your own number stays live on your physical SIM for calls and SMS.

Compatible devices

Check your phone: dial *#06# and look for an EID. Model by model: the compatibility page.

Practical notes for South Korea

Practically everything in Korea assumes a data connection, from transit cards to restaurant ordering. Arriving without data is a genuine handicap.

Frequently asked questions

Will I get a Korean phone number?

No. This is a data eSIM, and we don't sell Korean numbers. Your home SIM can stay on for texts.

Does Naver Map work with the eSIM?

Yes, along with KakaoMap and every other app. They only need data.

One trip to Seoul and Tokyo, one eSIM?

Yes. Pick a regional plan that covers both, and it works in both countries without reinstalling.

Do I need an ID or KYC to buy an eSIM for South Korea?

No. Cypher eSIM never asks for a name, email, phone number or government ID. You pay in cryptocurrency and the QR code appears on the page — that is the whole flow, for South Korea and everywhere else we cover.