A Korean phone number is the simplest path to a working KakaoTalk account in Korea. If you arrive in Korea and find that KakaoTalk asks for an SMS verification, banking apps refuse to sign you up, or food delivery apps will not save your account, the common root cause is the same: those services expect a Korean 010 mobile number. This guide explains how foreigners get a Korean number that works with KakaoTalk and similar Korean apps.

Why KakaoTalk wants a Korean number

KakaoTalk is the messaging app most Koreans use for daily chat, KakaoPay, KakaoMap, Kakao TV, and many connected services. When you create a KakaoTalk account in Korea, the app verifies your identity by sending an SMS code to a phone number. If the number is registered with a Korean carrier, the verification is straightforward. If it is registered overseas, the verification can fail or limit your account features.

Korean apps that frequently ask for a Korean 010 number include:

KakaoTalk (and the wider Kakao ecosystem)
Naver and Naver Pay
Korean banking and finance apps
Coupang, Baemin, Yogiyo, Market Kurly
Kakao Mobility (Kakao T) and other ride-hailing apps
Korean government and immigration services (Hi Korea, etc.)

Two ways to get a Korean number as a foreigner

Prepaid SIM or eSIM with voice and SMS: works with a passport, no ARC needed. Includes a Korean 010 number for the duration of the plan.
Postpaid plan with voice and SMS: works after your ARC is issued and you have a Korean bank account for autopay. Includes a Korean 010 number on a longer billing cycle.

Data-only eSIM plans are great for maps and browsing but do not include a Korean 010 number. To use KakaoTalk with full features, you want a plan that lists voice and SMS as included, or a Welcome / Starter SIM that bundles a Korean number with the data window.

Step-by-step: KakaoTalk verification with a Korean number

Activate a Kimchi Mobile plan that includes voice and SMS, so a Korean 010 number is assigned to your line.
Open the KakaoTalk app on your phone and choose to register a new account.
Enter your Korean 010 number when prompted for the phone verification step.
KakaoTalk sends an SMS code to that number. Wait a few seconds and enter the code in the app.
Complete the remaining KakaoTalk profile setup steps (display name, photo, optional Kakao ID).
Use your KakaoTalk account to sign in to other Kakao services such as KakaoPay or KakaoMap as needed.

If the SMS code does not arrive, check that your phone is on a Korean network (not data roaming from your home country), that SMS is not blocked by your carrier or app permissions, and that the Korean 010 number you entered matches the one assigned to your line.

Plan options that include a Korean number

Kimchi Welcome SIM, 60-day prepaid window with a Korean number, plus a switch to a 12-month KT postpaid plan after your ARC is ready.
Korea Starter SIM, a similar 60-day path with the postpaid transition.

For background on how the Korean MVNO and postpaid landscape works for foreigners, read Korea MVNO for foreigners. For EPIK teachers in 2026, the EPIK-specific path is described in EPIK teacher SIM Korea and Teacher SIM Korea.

Common pitfalls for foreigners with KakaoTalk

Using only a data eSIM: works for chats with people who already have you saved, but new account verification typically needs SMS to a Korean number.
Trying overseas SMS verification: sometimes works, sometimes does not, and may not unlock all KakaoTalk features once you start using Korean services.
Switching numbers later: if you change your Korean number after KakaoTalk is verified, update KakaoTalk and reconnected Kakao services so they recognize the new line.
SMS blocked by app permissions: on some phones, the messaging app permission can block carrier SMS. Allow notifications and read access for SMS during verification.

Frequently asked questions

Can I use KakaoTalk in Korea without a Korean phone number?

You can use KakaoTalk that was already verified with an overseas number, but some features and account verifications expect a Korean number. For full daily use in Korea, a Korean 010 number is the simplest path.

Do I need an Alien Registration Card to get a Korean phone number?

An ARC is not required for passport-based prepaid plans. Prepaid eSIM and SIM plans with voice and SMS give you a Korean 010 number using your passport. Postpaid plans require ARC.

Will my Korean number stay the same when I switch from prepaid to postpaid?

Within the right product path, yes. Kimchi Mobile’s Welcome SIM and Starter SIM packages are designed so the Korean 010 number you receive during the prepaid window can carry over to the 12-month postpaid plan after your ARC is ready.

Is a data-only Korea eSIM enough for KakaoTalk verification?

A data-only eSIM does not include a Korean number for SMS reception, so it cannot receive the Korean 010 SMS code that KakaoTalk uses for new account verification. For first-time KakaoTalk verification in Korea, a plan with voice and SMS is the easier path.

Will KakaoPay work with my Korean number?

KakaoPay needs both a Korean phone number and a Korean bank or card account. Foreigners typically link KakaoPay after their ARC, Korean bank account, and Korean number are all ready.

What happens to my KakaoTalk number when I leave Korea?

When your Korean line is canceled, KakaoTalk may lose verification of that number. Some users update KakaoTalk to a new number before leaving Korea. Kimchi Mobile’s English support can help you plan the transition.

Next steps

Pre-arrival install: Korea eSIM before arrival
Plan comparison: Korea eSIM comparison guide
QR activation: Korea eSIM activation
Resident pathway: Korea MVNO for foreigners
EPIK and English teachers: Teacher SIM Korea
Browse plans: Kimchi Mobile shop

Questions about your specific phone, KakaoTalk account, or plan options? Contact Kimchi Mobile, we respond in English and have supported foreigner residents since 2010.