Getting a Korean SIM Card: 유심 vs 요금제
Written and reviewed by Jun and Jin, native Korean speakers
Published · How we write & review
After this page, you can get a Korean phone number and SIM card set up as a new arrival.
10-second answer
The short answer
Short-term visitors typically get a prepaid 유심 (yusim, USIM) at the airport or a convenience store — no ID or contract needed beyond a passport. Longer-term residents usually sign up for a 요금제 (yogeumje, monthly phone plan), which requires an 외국인등록증 (oegugindeungnokjeung, Alien Registration Card) and often a bank account. Airport kiosks, telecom stores (SKT/KT/LG U+), and budget MVNO brands (알뜰폰, altteulpon) are the three main routes.
Quick check — did that land?
1. What's the quickest option for a short-term visitor?
Need a Korean SIM card?
Full Dialogue Walkthrough
A quick prepaid SIM purchase, then a fuller monthly-plan signup. Try "Practice as You" and answer each line yourself before checking.
유심 사고 싶어요.
yusim sago sipeoyo.
I'd like to buy a SIM card.
여권 좀 보여 주세요.
yeogwon jom boyeo juseyo.
Please show me your passport.
일주일 쓸 거예요.
iljuil sseul geoyeyo.
I'll use it for a week.
데이터 무제한 요금제 있어요?
deiteo mujehan yogeumje isseoyo?
Do you have an unlimited data plan?
외국인등록증 있으세요?
oegugin-deungnokjeung isseuseyo?
Do you have your Alien Registration Card?
번호 그대로 쓸 수 있어요?
beonho geudaero sseul su isseoyo?
Can I keep my current number?
See also: Opening a Bank Account in Korea
Three Ways to Get Connected
| Option | Best for | What you need |
|---|---|---|
| 유심 (prepaid USIM/eSIM) | Short trips, tourists | Passport only — no contract, no bank account |
| 요금제 (carrier contract) | Residents, students, workers | 외국인등록증, often a Korean bank account |
| 알뜰폰 (budget MVNO) | Long-term residents wanting cheaper monthly rates | Same as 요금제, but through a discount reseller instead of SKT/KT/LG U+ |
The big three carriers are SKT, KT, and LG U+ — all offer both prepaid and contract options. 알뜰폰 brands run on the same networks at a fraction of the price, making them popular once you're settled.
Useful Phrases
데이터 무제한 요금제 있어요?
deiteo mujehan yogeumje isseoyo?
Do you have an unlimited data plan?
무제한 = unlimited. 있어요? checks availability.
번호 그대로 쓸 수 있어요?
beonho geudaero sseul su isseoyo?
Can I keep my current number?
Relevant when switching carriers (번호이동, number portability).
Why a Korean Number Matters So Much
A Korean phone number isn't optional infrastructure here — it's the backbone of identity verification for banking, food delivery apps, KakaoTalk, and most online sign-ups. Getting a number early, even a basic prepaid one, unblocks almost everything else on a settling-in checklist.
Common Mistakes
Mistake #1 — Assuming a foreign SIM/eSIM works the same as a Korean carrier number
Many Korean apps and verification systems specifically require a domestic (010) number — a foreign roaming number often won't pass verification.
Mistake #2 — Signing a long 요금제 contract on day one without comparing 알뜰폰
Budget MVNOs run on the same towers for noticeably less — worth comparing once you're not in a rush.
Mini Quiz
2. What does 알뜰폰 refer to?
3. Why do many apps require a Korean (010) number specifically?
Related Knowledge
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