Question 1

Can I receive SMS verification codes on a Korean tourist eSIM?

Accepted Answer

It depends on the plan. Most tourist eSIMs/SIMs are 'data-only', so they have no Korean phone number (010) and cannot receive SMS at all. A prepaid SIM that includes a Korean 010 number with calls/texts can receive SMS one-time codes (OTP). Before buying, check whether the plan explicitly includes a 'Korean number' or '010 number / SMS'.

Question 2

What's the difference between SMS OTP and 본인인증 (real-name identity verification)?

Accepted Answer

SMS OTP simply means entering a code sent by text — usually fine if your SIM has a number. '본인인증' (real-name verification) is a stronger step that confirms your identity using a phone number registered in your real name with a Korean carrier plus your real-name details — which tourists generally cannot pass. Many Korean apps (banking, some delivery, government services) require this 본인인증, not just an OTP.

Question 3

Why does app verification (delivery, banking) still fail even with a Korean number?

Accepted Answer

Because the number on a tourist prepaid SIM is usually not registered in your real name. 본인인증 passes only when the number matches your real name and date of birth in the carrier's records — and short-term prepaid SIMs often don't meet that. So you may receive an OTP on the number yet still be blocked at the real-name verification step.

Question 4

Which tourist SIM should I buy to receive SMS verification codes?

Accepted Answer

Choose a prepaid SIM that includes a Korean 010 number with voice/SMS — not a 'data-only' plan. If the listing mentions a 'Korean phone number', '010', or 'voice & SMS', it can receive OTPs. Some eSIMs include a number too, so confirm before buying; another option is pairing a data-only eSIM with a number-included physical SIM.

Question 5

Are there alternatives if an app requires 본인인증?

Accepted Answer

① If the app supports passport-based foreigner verification, use that. ② If there's a web or global (English) version, it may work without 본인인증 (e.g., booking directly on hotel/airline official sites). ③ A Korean resident host/friend may help, but signing up under someone else's name can violate terms and isn't recommended. Policies differ by service — check the official guidance.

Question 6

Can I use KakaoTalk or Naver with a tourist SIM?

Accepted Answer

KakaoTalk can be registered/used via SMS if your SIM has a number; even with data-only you can sign up in advance using your home-country number and then run it on data alone. However, KakaoPay, money transfer, and some financial features need 본인인증, so they're limited for tourists. Naver's basic search/maps work without login, but some features (reservations, Pay) may require 본인인증.