Can I Use a Mobile Phone in Korea Without an ARC?

If you have just arrived in Korea without an Alien Registration Card (ARC), you can still get online. You just can't sign up for a standard postpaid plan — those require an ARC. Your practical options are prepaid SIMs and traveler eSIMs.

Quick Answer

Who you are	What works
Tourist / short-term (C-3)	Traveler eSIM, airport prepaid USIM
Long-stay but waiting on visa	Short-term prepaid USIM, switch to postpaid once ARC issued
Student / worker just arrived	1–3 months prepaid, then MNP to postpaid after ARC

Three Realistic Options

1️⃣ Traveler eSIM (5-minute activation)

Pros

• Buy online, scan QR — no store visit, no shipping
• Passport only, no ARC or Korean bank account
• Flexible 7/15/30-day plans

Cons

• Usually data-only; no real calls or SMS
• No Korean phone number (or only a temporary virtual one)
• Data cap per day or total

Best for: 1 week to 1 month stays, map/messenger usage only.

2️⃣ Airport Prepaid USIM

Pros

• Counters at Incheon, Gimhae and Jeju airports — SK Telink, KT M Mobile, etc.
• Passport-only signup, pay on the spot
• You get a real Korean 010-xxxx number, so KakaoTalk and delivery app SMS verification works

Cons

• Pricier than postpaid (10GB ≈ 40,000 KRW/month)
• Sold in 1 / 2 / 3-month blocks, no auto-renewal
• Booth operating hours are limited

Best for: 1–3 month stays where a Korean number matters.

3️⃣ Passport + Local Address (limited MVNOs)

A few MVNOs accept passport + proof of local address (lease, hotel confirmation) for short-term postpaid signup. Caveats:

• Only a handful of carriers allow this
• Identity verification is done manually in person
• Once your ARC arrives, you often have to re-register

In practice, options 1 and 2 are more realistic for most foreigners.

Never Do This

Once Your ARC Arrives

Switch to a postpaid plan as soon as possible — it is significantly cheaper:

1. Pick a plan on the Plans page
2. Sign up with ARC + passport + Korean bank account
3. Use Mobile Number Portability (MNP) to keep your prepaid number
4. Cancel the prepaid contract (usually no fee)

Summary

• Tourists: Traveler eSIM (fastest, data-only)
• 1–3 month stays: Airport prepaid (includes Korean number)
• Planning to stay long-term: prepaid first → switch to postpaid after ARC
• Don't use someone else's identity to sign up

SelPl's plan comparison is based on postpaid options. For prepaid, visit the carriers' official sites directly.