Why a Korean phone number lets you do almost everything

Most Korean apps text a code to a Korean phone line in your name. A tourist SIM usually fails this step. Here is why. · 휴대폰 본인확인

Most times foreigners get stuck, it comes down to one step. The app texts a code to a Korean phone number in your own name, and it will not let you go further without it. This is how most 본인인증 / ID verification reaches you.

Not every Korean SIM counts

A tourist SIM from the airport gives you data. It does not give you a phone line in your name that can get text codes, and that is what apps check. Many tourist SIMs only do data, or they are not tied to your ID the way carriers need for 본인인증. So you have working internet but still fail the verification screen.

What works is a line where:

the number can get text messages, and
the carrier has tied it to your real ID (passport or ARC), so it can confirm “this name and this number are the same person.”

Who can get a line that works

Residents (ARC holders): You can get a normal monthly or registered prepaid line in your own name from KT, SKT, or LG U+ (or their budget brands). This is the one that lasts.
Visitors: Harder. Some prepaid and eSIM products for foreigners do tie the line to your ID and can get text codes, but it changes by product and carrier, and short validity dates make it tricky. Before you count on a SIM, check that it does ID verification, not just data.

What to do when you cannot get one

No Korean line that works? Many visitors will not have one in time. Then the step that needs verification has to be done by someone who does. That is what Toyoni does. We hold Korean lines that pass verification and do the verified step for you (signup, booking, checkout), then hand you the result.

Services where this comes up

Baemin (배달의민족) Baemin's normal signup asks you to verify your ID with a Korean phone number (본인인증), which tourists do not have. But you can place a normal order through Baemin Global without it. Bunjang (번개장터) Local Bunjang lets foreigners join only after 본인인증, where Korea checks your real ID through a Korean phone or Toss. Tourists with no ARC can't do it, and many residents' checks still fail. CatchTable The original Korean CatchTable app asks for 휴대전화번호 본인인증 (Korea checks your real ID through a Korean phone) to sign up. With no Korean carrier line, sign-up won't go through. Coupang Coupang lets you browse and type in a delivery address. But to pay, Korea checks your real ID through a Korean phone in your own name, and a foreign card does not always work. Coupang Eats You can read Coupang Eats in English, but signup and checkout ask for 본인인증 (a Korean phone number and an ID check), and the payment step often turns down foreign cards. Daangn / Karrot (당근) Daangn lets you look around, but to chat or buy it asks for a Korean phone check in your own name plus a verified GPS neighborhood. Tourists and overseas buyers usually cannot give it. Interpark / NOL Tickets To book on the Korean Interpark/NOL site, Korea checks your real ID by phone or I-PIN. Most foreigners can't pass it. Kakao T Kakao T signup asks you to verify your phone and ID. That usually means a Korean mobile number in your own name, which most visitors don't have. Korail / KTX You can book a normal KTX ticket on the Global site, but member-only fares, holiday presales, and KorailTalk membership make Korea check your real ID with a phone in your Korean name and Korean-card fields you don't have. Korean bank account (Toss / KakaoBank) KakaoBank's signup is built for Korean citizens and won't take foreigner IDs. Toss Bank lets a registered foreigner open online, but only with an ARC (외국인등록증) and an ID check. Tourists can't open a normal account at either one. Korean SIM & phone number A tourist prepaid SIM or eSIM gives you data, but it can't prove who you are to Korean apps (본인인증), and calls and texts only work after a passport check at an airport carrier counter. Kurly (Market Kurly) Market Kurly lets foreigners sign up, but it asks for a Korean phone SMS code (휴대폰 인증) to finish, and a foreign number often can't get the code. Melon Ticket Korean Melon Ticket only lets you book after Korea checks your real ID (by phone or I-PIN). Tourists can't pass it, and even residents need a Korean phone line tied to their ARC. Musinsa To buy on the Korean musinsa.com you need a one-time 본인인증 tied to a Korean phone in your own name, and checkout wants Korean-only payment. So tourists and many residents cannot finish an order. Olive Young Olive Young's Korean app and site need a CJ ONE membership. To sign up, Korea checks your real ID: a Korean phone in your own name or a Korea-issued ID. Tourists can't do that. Tabling To sign up and book, Tabling wants a Korean phone number tied to a Korean ID check, and it sends your turn alert over KakaoTalk, so a foreign SIM never gets the alert. YES24 Ticket The Korean YES24 site checks your real ID before you can book, and the phone/I-PIN steps need a Korean number or ARC you may not have. Yogiyo Yogiyo asks first-time members to prove their ID once with 본인인증 (an ARC plus a Korean phone in the same name, no prepaid SIMs), and its checkout turns away most foreign cards.

Other reasons you get stuck

Korean ID verification (본인인증), explained The ID check behind most Korean signups, and why foreigners get stuck on it.