Guides · Trip essentials

Korea eSIM vs SIM vs Pocket Wi-Fi: Do You Need a Korean Number?

Your three options at a glance

Source for where to buy: VISITKOREA's communications guide (updated September 2026).

Data-only vs a plan with a Korean number

Data-only plans give you internet and nothing else. No Korean number, no Korean SMS.

For many trips this is enough: maps, translation, KakaoTalk, LINE, social media and ticket apps all run on data.

Plans with a 010 number add a Korean mobile number. KT, for example, describes its visitor eSIM as a prepaid product only for foreigners visiting Korea, with numbers that start with 010.

You reserve with your name exactly as printed on your passport, and KT says the eSIM may not be issued if your name, nationality or passport number don't match.

Why a Korean number can matter

• SMS verification. Many Korean apps and websites send a code by text to sign up or log in. Those codes often go only to Korean numbers.
• Waitlists. Restaurant waitlist systems and some reservation services text you when it's your turn. Whether they accept foreign numbers varies by service.
• Delivery and pickups. Delivery riders, hotels and taxi drivers can call or text you on a local number.

When you can skip it

Some apps are built for visitors. Kakao Mobility's k.ride taxi app, for example, lets foreigners sign up without a Kakao account and pay with a foreign card.

If your plan is just Seoul sightseeing, concerts and cafés, a data-only eSIM plus visitor-friendly apps may be all you need.

Tip: If your phone has dual SIM, keep your home SIM active (with roaming off for data) so you can still get verification texts from your own bank and apps.

What works without an ARC

An ARC (Alien Registration Card) is for long-term residents. Tourists don't have one, and you don't need one for a tourist SIM or eSIM.

• Apply with your passport, no ARC: prepaid tourist SIMs and eSIMs from the carriers, including plans with a 010 number. Extra steps are possible.

Have your passport ready, use your real passport details, and check the carrier's current ID rules before you buy. Korea has been tightening identity checks for new mobile lines in 2026.

Where to buy

Online before you fly (eSIM)

1. Check your phone supports eSIM and is carrier-unlocked.
2. Buy from a carrier's tourist site or a reseller. Decide first: data-only, or with a 010 number?
3. You'll get a QR code by email. Install it on Wi-Fi before you leave, but switch it on when you land (follow the seller's activation rules).
4. Don't delete the eSIM during your trip.

At the airport (SIM, eSIM, pocket Wi-Fi)

VISITKOREA says Incheon, Gimpo, Gimhae (Busan) and Jeju airports all have roaming centers run by SK Telecom, KT and LG U+. They sell prepaid USIM cards and handle pickups of pre-ordered SIMs and rental devices.

Pocket Wi-Fi ("Wi-Fi egg") and phone rentals are also available at the major airport roaming centers.

Convenience stores

CU, GS25, 7-Eleven and emart24 sell physical USIM cards, but VISITKOREA notes that stock varies by branch. Don't count on it as your only plan.

Free Wi-Fi as a backup

Free public Wi-Fi is available at airports, subway stations, train stations and many public places. See Wi-Fi Free.

It's useful, but coverage isn't reliable everywhere, so don't rely on it for ticketing or meeting friends.

How much does it cost?

Prices depend on the number of days, data speed and whether a number is included. Compare the carriers' official tourist pages before buying.

FAQ

Can I get a Korean phone number without an ARC?

Yes. You apply for prepaid tourist SIMs and eSIMs with a 010 number with your passport, no ARC needed.

Extra steps are possible, so check the carrier's notice before you buy.

Is a data-only eSIM enough for a K-pop trip?

For many fans, yes. Maps, translation, messaging and most ticket apps run on data.

Choose a plan with a number if you want restaurant waitlist texts, delivery calls, or SMS codes from Korean apps.

Can I buy a SIM card at the airport when I land?

Yes. Incheon, Gimpo, Gimhae and Jeju airports have carrier roaming centers that sell prepaid USIM cards and hand out pre-ordered SIMs and Wi-Fi devices.

My phone doesn't support eSIM. What should I do?

Buy a physical USIM at an airport roaming center (or pre-order one for airport pickup), or rent a pocket Wi-Fi. Pocket Wi-Fi is also handy if you travel with friends.