SIM cards and eSIM in South Korea

Which carriers matter, what buying a SIM involves, and when an eSIM is the smarter move.

Mobile internet eSIM Best option when traveling

Guac

Recommended

Reliable mobile internet at better prices than most travel eSIMs, with polished iOS and Android apps and support for making and receiving phone calls.

App Store Play Store See plans

Airalo

One of the biggest travel eSIM brands, with a very large destination catalog.

Holafly

Known for unlimited-data plans in many destinations, at a higher price per gigabyte.

Buying a local SIM card ID registration required

Registration: Bring your passport; the seller registers the prepaid SIM during activation.
Tourist plans and prices: Starter prices begin near $11-22; compare the current data allowance before buying.
Where to buy: Airport counters and city carrier stores are the easiest places to buy; confirm activation before leaving.
Airport prices: Airport prices are usually higher than city or online prices.
Local eSIM: Tourist eSIMs are available; check whether the chosen plan includes a local phone number.

Good to know

Google Maps has limited navigation features here; use Naver Map or KakaoMap instead.

Local carriers

KT
Tourist-friendly choice with a straightforward purchase process.
SK Telecom
A solid alternative; compare current prepaid offers before buying.
LG U+
A solid alternative; compare current prepaid offers before buying.

eSIM and SIM cards by country→

Sources and how current this is

Data checked July 2026

Source dates: Seoul Start: 21 Jun 2026 | Korea Peek: 16 Apr 2026 (first-hand) | Mile Asia: ~16 Jul 2026 | In My Korea: 24 Apr 2026

Sources disagree: Registration practice or tourist eligibility still varies between published accounts. Quoted prices or bundle details vary by seller and may change at short notice.

Sources

Frequently asked questions

Do I need my passport to buy a SIM card in South Korea?

Bring your passport; the seller registers the prepaid SIM during activation.

Should I buy a SIM card at the airport in South Korea?

Airport prices are usually higher than city or online prices.

What is the best eSIM for South Korea?

Guac eSIM covers South Korea with data plans starting from $1.50 per GB and instant activation, so your phone is online the moment you land. Airalo and Holafly are popular alternatives.

← All essential apps for South Korea

Mobile internet eSIM Best option when traveling

Guac

Recommended

Reliable mobile internet at better prices than most travel eSIMs, with polished iOS and Android apps and support for making and receiving phone calls.

App Store Play Store See plans

Airalo

One of the biggest travel eSIM brands, with a very large destination catalog.

Holafly

Known for unlimited-data plans in many destinations, at a higher price per gigabyte.

Buying a local SIM card ID registration required

Registration

Bring your passport; the seller registers the prepaid SIM during activation.

Tourist plans and prices

Starter prices begin near $11-22; compare the current data allowance before buying.

Where to buy

Airport counters and city carrier stores are the easiest places to buy; confirm activation before leaving.

Airport prices

Airport prices are usually higher than city or online prices.

Local eSIM

Tourist eSIMs are available; check whether the chosen plan includes a local phone number.

Good to know

Google Maps has limited navigation features here; use Naver Map or KakaoMap instead.

Local carriers

KT

Tourist-friendly choice with a straightforward purchase process.

SK Telecom

A solid alternative; compare current prepaid offers before buying.

LG U+

A solid alternative; compare current prepaid offers before buying.

Sources and how current this is

Data checked July 2026

Source dates: Seoul Start: 21 Jun 2026 | Korea Peek: 16 Apr 2026 (first-hand) | Mile Asia: ~16 Jul 2026 | In My Korea: 24 Apr 2026

Sources disagree: Registration practice or tourist eligibility still varies between published accounts. Quoted prices or bundle details vary by seller and may change at short notice.

Sources

Frequently asked questions

Do I need my passport to buy a SIM card in South Korea?

Bring your passport; the seller registers the prepaid SIM during activation.

Should I buy a SIM card at the airport in South Korea?

Airport prices are usually higher than city or online prices.

What is the best eSIM for South Korea?

Guac eSIM covers South Korea with data plans starting from $1.50 per GB and instant activation, so your phone is online the moment you land. Airalo and Holafly are popular alternatives.