Korea&YouYour Korean Phone Number, Part 1: Getting Connected the Moment You Land
The prepaid 010/USIM guide for your first days in Korea — before your Residence Card even exists
Landing in Korea without a working phone number feels like landing without shoes. You can walk, technically, but everything is harder than it needs to be — no map, no way to call a taxi, no way to text your homestay family that you've arrived.
The good news: a working 010 number is easy to get on day one, using nothing but your passport. This post covers exactly that — your temporary "bridge" line for the first days or weeks in Korea, before you have your Residence Card. Part 2 covers the permanent number you'll register afterward.
Quick answer: You can get a working Korean number the day you land, using only your passport. This passport-based number is temporary: it expires when you leave Korea (or around 90 days), and it cannot be used for Korean identity verification — banking, delivery apps, or school portals. Once your Residence Card arrives, you'll register a separate, permanent line — that process is covered in Part 2.
Why You Need This Before Anything Else
Korea enforces strict real-name verification on every SIM card, so carriers always require an ID document — a passport for short stays, a Residence Card for long-term ones. A passport-based line is limited, but it's enough to get you online, receive calls, and function for your first stretch in the country.
Option A — Pre-Order Online Before You Fly
All three major Korean carriers — SK Telecom, KT, and LG U+ — sell prepaid tourist SIM and eSIM plans you can buy before departure and activate on arrival. LG U+'s English-language site is a clear example of how this works:
• Go to LG U+ Korea SIM (English site).
• Open the Products menu, then choose SIM Card for a physical card or eSIM if your phone supports it.
• Select your travel dates and pay online. An eSIM order emails you a QR code you can scan before you even land; a physical SIM is held for pickup.
• After you land, use the Registration menu — Register SIM if you already have the card in hand, or Airport Self-Check-In if you're collecting it at the counter.
KT and SK Telecom run comparable pre-order and roaming services, so it's worth comparing prices across all three before you commit.
Option B — Just Walk Up at the Airport
If you didn't pre-order, every terminal at Incheon, Gimpo, and Gimhae has SKT, KT, and LG U+ roaming counters right after immigration. Show your passport, pick a plan, and you'll usually be done in 10–15 minutes.
Option C — Convenience Store Kits
GS25, CU, and 7-Eleven also sell prepaid SIM kits around the city. You register the SIM yourself — through an app or a phone call — entering your passport details to activate the 010 number.
A Note on "Korea SIM" Resale Sites
Sites like krsim.net bundle SKT, LG U+, and MVNO tourist SIMs into one storefront, with home delivery or airport pickup. They're genuinely convenient for this first stretch. Just remember what they're built for: short-term visitors — the number still won't carry you through Korean identity verification once you're trying to open a bank account or sign up for a delivery app.
Before You Leave Home: Two Things to Check
• Country lock. Contact your home carrier to confirm your phone is unlocked. A locked phone simply won't register a Korean SIM.
• Dual SIM, if your phone supports it. Keep your Korean number as a physical SIM and your home number as an eSIM (or vice versa), so you can receive texts from both countries at once.