Get a Korean SIM Without Your Alien Card — KT Postpaid SIM with Just Your Passport

Most international students arriving in Korea hit the same wall: "you need an alien card (ARC) before you can get a SIM." It is not true. With just your passport, you can pre-register a KT postpaid SIM and use a Korean number + data from your very first day in Korea.

Why you need a Korean SIM the moment you land

School registration, housing contracts, bank accounts, food delivery apps — almost every first-week procedure in Korea requires Korean phone verification. The alien card application must happen within 90 days of entry, but issuance takes 3–6 weeks. Without a SIM during that gap, almost every administrative step stalls.

Why prepaid and budget MVNO SIMs are not recommended

• Prepaid SIM: expensive data, often fails identity verification.
• Budget MVNO: hard to open under a foreigner name, weak carrier support.
• International roaming: more than 1 week and the cost exceeds a full month of a Korean SIM.

The cleanest option is a postpaid line on a major carrier — KT, SKT, or LG U+. Identity verification works 100%, and you can pre-apply and receive the SIM after arrival without visiting a store.

KT postpaid SIM for students — passport only

The KT postpaid student SIM that GEA supports applies these terms.

• Pre-register with just a passport scan (no alien card needed yet)
• First 2 months of service free
• Free SIM card
• Official KT line — 100% compatible with auth, banking, food delivery apps
• After your alien card is issued, the line is transferred to your name

Sign-up procedure (4 steps)

1. Pre-apply before departure

Send a passport scan and your planned arrival date — GEA pre-registers with KT.

2. Arrive in Korea

Pick the SIM up at Incheon/Gimhae/Gimpo airport, or have it delivered to your dorm.

3. Start using it

Insert the SIM on arrival and your Korean number + data are active.

4. Transfer to your name after your alien card is issued

Once your alien card is ready, GEA helps with the name transfer — no KT store visit needed.

FAQ

Q. Can I switch from another SIM to KT?

Yes. Number portability is supported — you can keep your current Korean number.

Q. Do I need to pay before arriving in Korea?

No. Pre-registration is free, and no service charges apply during the first 2 months.

Q. Is consultation available in Vietnamese or English?

Yes. GEA provides consultation in Korean, Vietnamese, and English. Pick your language in the consultation form below.