eSIM or SIM card in Korea: how to choose and set it up

You will use mobile data constantly in Korea: for maps, translation, taxis and messaging. Sort it out before you land, and your first hour at the airport will be much easier. We do not sell or recommend any particular provider. This guide helps you choose the right type.

Quick comparison

Option	Good for	Watch out for
Data-only eSIM	Most visitors. Install at home, works when you land	Your phone must support eSIM and be carrier-unlocked. No Korean phone number.
eSIM or SIM with a Korean number	Booking apps, restaurants or taxis that send a text code	Usually costs more. Some Korean identity checks still will not work for foreigners.
Physical SIM card	Phones without eSIM	You remove your home SIM. Keep it somewhere safe.
Pocket Wi-Fi	Groups sharing one connection	Another device to charge and carry, and you must return it.
Roaming from home	Very short trips, simplicity	Often the most expensive option. Check your carrier’s daily rate.

Do I need a Korean phone number?

For most visitors, no. Maps, translation, messaging and many taxi apps work with data only. A Korean number helps when a service sends a verification code by text, such as some delivery apps or restaurant waiting lists.

Even with a Korean number, some Korean identity checks are designed for residents and may not accept visitors.

Check that your phone supports eSIM

• iPhone: Settings → General → About. If you see an “Available SIM” or “Digital SIM” section, or the model is iPhone XS or newer, it supports eSIM. The phone must not be locked to your home carrier.
• Android: Settings → Connections (or Network & internet) → SIM manager. Look for “Add eSIM.” Support varies by model and region.

Install an eSIM (step by step)

Do this at home on Wi-Fi, a day or two before you fly.

1. Buy a Korea eSIM from a provider you trust. You receive a QR code by email.
2. iPhone: Settings → Mobile (Cellular) → Add eSIM → Use QR code. Android: Settings → Connections → SIM manager → Add eSIM → Scan QR code.
3. Label the new line “Korea” so you can tell it apart from your home line.
4. Set the Korea line as your mobile data line, but leave data roaming off until you land, unless your provider says otherwise.
5. When you land, turn on the Korea line and data roaming for that line only.

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Image coming soon esim-android-add.png

Tip: Keep your home SIM active for calls and texts from your bank, but switch off its data to avoid roaming charges.

Buying at the airport

Mobile carrier counters in the Incheon Airport arrivals hall sell SIM cards, eSIMs and pocket Wi-Fi. Lines can be long when several flights land at once, which is why many people set up an eSIM before they fly.

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How much data do I need?

Maps and messaging use little data. Video calls, uploading photos and streaming use the most. For a typical city trip, a plan with a daily allowance or “unlimited at reduced speed after a limit” works well.

Free Wi-Fi

Free public Wi-Fi is available in many subway stations, buses, parks and cafés. It is useful as a backup but not a replacement for mobile data while you are walking around.

Before you fly: checklist

• Phone is carrier-unlocked and supports eSIM (or you have a plan for a SIM card).
• eSIM installed and labelled, data roaming off until you land.
• Apps installed: see essential apps.
• Hotel address saved in Korean.

Prices, timetables and rules in Korea change often. We check this guide regularly, but please confirm details with the official sources linked above before you travel.