Last updated: 2026-06
Getting your Alien Registration Card (ARC) usually takes more than a month. In the meantime, you often can't get a Korean mobile number (010) issued in your own name — and of course, the very screens for taxi apps, train ticket booking, and payment registration all start by demanding "mobile identity verification."
So the real problem right after you arrive isn't whether or not you have a number. The key thing is that there's a split between services that work without a phone number and services that effectively require a Korean number in your own name. Once you know how far a passport and a foreign card will get you, and where a line registered in your own name becomes the blocker, you'll spend a lot less time stumbling through the gap while you wait for your card.
Below is that boundary, sorted by category. (Rules change often, so it's a good idea to double-check the key details on each service's official information page.)
Why Do They Require a Korean Number? — Understanding the Verification System
Many Korean apps use SMS mobile identity verification as the basis for confirming who you are. The catch is that passing this check isn't just about being able to receive an SMS — in most cases the line has to be a postpaid, registered line in your own name (based on your ARC).
- Most prepaid SIMs and tourist eSIMs sold at the airport are passport-based or data-only. As a result, they may not pass identity verification for places like the PASS app, banks, fintech services, or Government24.- Reportedly, starting January 2025, passport-only registration has been phased out in some clearance and verification systems — a shift of the baseline identity record from "passport" to "ARC." The key point is that you're not blocked because you lack a number — you're blocked because you can't pass verification that's based on a "registered line in your own name tied to your ARC." Once you understand this structure, you can predict in advance which services will and won't work.
What Works Without a Korean Phone Number (as of 2026-06)
Let's start with the side where the path opens up even without a number.
| Service category | Works without a phone number? | Notes |
|---|---|---|
| Some messenger / portal accounts | May be possible | Naver officially introduced "passport verification" — identity verification with just a passport — starting 2026-06 |
| Some ride-hailing apps | May be possible | There are apps that support login via email, Google, or Apple ID |
| Some foreign-card payment gateways | May be possible | Naver Pay and others use a separate gateway for foreign Visa/MC (updated late 2025) |
| Transit booking & payment (passport + foreign card) | Partially possible | KorailTalk and others allow guest booking, but errors are frequent (see below) |
- Naver account: Starting June 4, 2026, Naver officially introduced "passport verification," which lets foreigners verify their identity with just a passport. With only a smartphone and no Korean mobile number, you can verify and then use Naver reservations, orders, and payments (sign-up with overseas numbers has been expanding in phases since 2025). That said, some Naver Pay features may require additional verification.
- Ride-hailing: There are alternative apps for foreigners that let you sign up via email, Google, or Apple ID without a Kakao account or a Korean number.
- Foreign-card payments: Naver Pay is reported to have updated its foreign-card acceptance in late 2025, introducing a method that processes international Visa and Mastercard through a separate gateway without domestic financial verification.
What Effectively Requires a Korean Number
The other side is just as clear. These are services that effectively require a Korean number in your own name (010, ARC-registered). Rather than "it definitely won't work," it's more accurate to understand it as hard to pass under current verification policies.
- PASS (mobile identity confirmation): Passport-based prepaid lines may be rejected. The common guidance is that an ARC-registered postpaid line is the basic requirement.- Major banks & fintech (Toss, Kakao Pay, etc.): Many require a registered line in your own name tied to your ARC. Kakao Pay is described as supporting Alien Registration Number entry, but you can't sign up with a tourist prepaid SIM or an overseas number — you need a 010 number in your own name. Toss also requires a Korean number at the initial SMS verification step.
- Government24 and other public services: It's typical for these to require verification based on a registered line in your own name tied to your ARC.
What About Transit Booking? — The KorailTalk Case
Train (KTX) booking is where foreigners get blocked most often. And yet Korail itself is open. On the official site and in KorailTalk, booking as a guest with your passport details and a foreign card does actually work. The problem is the payment step. When it fails, the reason is usually one of these three.
- 3D Secure not enabled: If your issuing bank doesn't have international 3D Secure turned on, it can fail at the verification step.
- Name format mismatch: If the embossed English name on your card and what you entered differ by even a single space or hyphen, it can be silently declined.
- Poor error messages: Often you just get a generic payment failure with no explanation of which step failed.
Here are the fixes. Enter your name exactly as embossed on the card, check with your issuing bank whether international 3D Secure is enabled, and try from the latest Chrome on desktop. If it still doesn't work, the standard advice is to retry in the app.
Frequently Asked Questions (FAQ)
Q1. If I have a tourist prepaid SIM or eSIM, can I pass identity verification? A. Usually it's tough. Prepaid SIMs bought at the airport are often passport-based or data-only, so they may not pass PASS, bank, or fintech verification. In many cases you need an ARC-registered postpaid line.
Q2. If I have no Korean number at all, can I really not pay for anything? A. It's not that you absolutely can't. There are payment paths that work without a phone number, such as services that process foreign cards through a separate gateway (e.g., Naver Pay's late-2025 update) or guest booking with a passport plus a foreign card. It varies by card company, service, and the timing of when it was issued.
Q3. Are the ARC and the residence report (F-4 overseas-Korean residence report) the same thing? A. No. The Alien Registration Card (ARC) and the overseas-Korean residence report are separate systems. The documents required when opening a line in your own name may differ, so check the guidance from your carrier or the relevant agency.
Q4. During the roughly one-month gap before I get my card, how do I handle transit and payments? A. This gap is the most inconvenient stretch. The practical approach is to use services designed so you can start using them right away, without a Korean number or identity verification.
The Easiest Way to Ease This Hassle
In your first days after arrival, it's tiring to have to weigh "does this work without a phone number?" for every single service. LACHA was built to target exactly that pain point: it lets you search and book KTX and express buses without a Korean number or identity verification, paying with overseas methods like Alipay and WeChat Pay.
You can still use official channels like KorailTalk. It's just that foreigners often get blocked at the verification and payment steps. If you'd like to get through the roughly one-month gap before your card arrives a little more smoothly, we recommend trying out a flow you can use right away, without a Korean number.
Stuck on payments or bookings without a Korean phone or bank account? Check out LACHA.
Built to work without a Korean phone number or bank account, with overseas payment methods like Alipay, WeChat Pay, and Apple Pay. Taxi hailing plus KTX, express bus, and airport railroad (AREX) booking — all in one app.
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