🇰🇷 eSIM plans for South Korea

Starting at $6.49/day*
  • No data caps
  • 7-days valid
  • Fast, reliable connection
  • Skip the roaming bill
  • QR code emailed instantly
Get your unlimited data
How many days
More days, lower daily rate
7
How many eSIMs
More eSIMs, bigger discount
1
Install it now or once you're away. Nothing starts counting until you reach your destination and switch the eSIM on.

* The "as low as" figure is the lowest per-day rate, taken from the longest unlimited data plan on sale here.

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South Korea eSIM travel illustration

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Here's how Onetel stacks up against other options in South Korea.

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Asia eSIM

Cover the Region with Asia eSIM

Cover South Korea and every neighboring country on one regional eSIM — no SIM swaps, no extra fees. Starting at $2.16.

View Asia Plans
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eSIM costs for South Korea

Prices shown in USD

7 days of unlimited data in South Korea costs $46.36 — about $6.62 a day on SK Telecom, KT or LG U+, with no roaming charge and no SIM to swap. In South Korea, 5G is live and median mobile download speed is 145.1 Mbps.

Duration Price Daily cost
1 day $7.70 $7.70/day
3 days $20.60 $6.87/day
5 days $33.48 $6.70/day
7 days $46.36 $6.62/day
10 days $65.70 $6.57/day
15 days $97.92 $6.53/day
30 days $194.58 $6.49/day
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Which South Korea eSIM plan fits your trip?

Choose a South Korea eSIM by matching the allowance to your trip length and expected use, then check the existing network table for phone compatibility. The page keeps its country-specific operator, band and median-speed information, while the sections below help you compare plan sizes and consult the official operator maps linked through SmartChoice.

Start with the length of your stay, then allow for navigation, messaging, streaming and work use. A fixed-volume plan gives you one data pool across its stated validity period.

Short trip

1 GB / 7 days

Best for: A short visit where mobile data is mainly for maps, messages and occasional browsing.

This is the smallest fixed-volume profile for a stay of up to seven days.

Usage tip: Use Wi-Fi for video, photo backups and app updates to keep more data available while you are out.

Two-week trip

3 GB / 15 days

Best for: Trips of up to two weeks with regular navigation, messaging and light social-media use.

The 3 GB allowance remains available across the stated fifteen-day validity period.

Usage tip: Download maps before longer journeys and use mobile data for live directions and updates.

Longer or higher use

10 GB or more / 30 days

Best for: Longer stays or travellers planning regular streaming, video calls or work-app use.

A larger thirty-day data pool gives heavier activities more room than the short-trip profiles.

Usage tip: Compare your normal phone usage with the available allowances and monitor usage during the trip.

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Which networks you connect to in South Korea

Your eSIM roams onto South Korea's own operators. These are the networks and the frequencies they run — check your phone supports them before you travel.

Operator 4G / LTE bands 5G bands 5G
SK Telecom B1, B3, B5, B7, B8 n78, n257 Yes
KT B1, B3, B5, B7, B8 n78, n257 Yes
LG U+ B1, B3, B5, B7, B8 n78, n257 Yes
145.1 Mbps
Median download
18.0 Mbps
Median upload

Source: Ookla Speedtest Global Index, July 2025

Coverage in South Korea

Subway and underground coverage is near-universal across all carriers; no significant rural not-spots. Foreign phones lacking B5 (850 MHz) may experience reduced LTE coverage in some indoor and rural areas where SK Telecom and KT rely on B5 for low-band reach.

Where to check mobile coverage in South Korea

SmartChoice links the statutory mobile coverage maps supplied by SK Telecom, KT and LG U+. Check the relevant operator map for the places on your itinerary, then confirm the network details for the selected eSIM product.

Cities and accommodation

Use the operator maps to check the area around each hotel, apartment or work location. Match the map you consult to the network information for the selected product.

Subways, indoor areas and regional routes

Check stations, underground areas and routes separately from the destination. Compare your phone with B5 and the other bands in the existing network table when planning indoor or regional use.

Jeju and onward travel

Check the operator map for your exact Jeju itinerary and the selected product's country scope for every stop. For travel beyond South Korea, compare a matching country plan with a regional option before departure.

Phone compatibility in South Korea

For broad compatibility, compare your phone with the 4G and 5G bands in the existing South Korea network table. The published network notes highlight B5 for some indoor and wider-area LTE coverage, while n78 and n257 are the listed 5G bands.

Set up the South Korea eSIM for your trip

Keep the QR code and installation instructions available offline, and complete each step according to the selected product's instructions.

When validity starts: Validity-start rules can differ by product. Check the selected plan details before installation and travel.

  1. Confirm that your phone is unlocked and supports eSIM before purchase.
  2. Save the QR code or manual installation details somewhere you can reach without mobile data.
  3. Use reliable Wi-Fi to install the profile at the time recommended in the product instructions.
  4. When you are ready to use it, select the travel eSIM for cellular data and apply the stated roaming and APN settings.
  5. Keep roaming disabled on your home line if you want to avoid using its travel data.
Network and coverage sources, checked 2026-10-10
South Korea travel guide

How to Enjoy South Korea

South Korea blends deep Confucian traditions with a hyper-modern pulse. In Seoul, explore the grand Gyeongbokgung Palace, then wander Bukchon Hanok Village to see Joseon-era houses still in use. Jeju Island's volcanic landscape offers coastal hikes and tangerine orchards. History fans should head to Gyeongju, the ancient capital of the Silla kingdom, home to the Bulguksa Temple and Seokguram Grotto, both UNESCO World Heritage sites.

The Korean Wave (Hallyu) is everywhere. K-pop fans can visit entertainment company halls or join a studio dance class. K-drama filming locations are marked on Naver Maps. K-beauty shoppers will find the best deals in Myeongdong and at multi-brand stores near Hongdae. For connectivity, get a local SIM at SK Telecom or Incheon Airport upon arrival. Seoul and Incheon have excellent English signage; smaller towns rely on translation apps.

Top Attractions

  • Gyeongbokgung Palace & Bukchon, Seoul - The largest of Seoul's five grand palaces. Rent a hanbok nearby for free entry. Behind the palace, Bukchon Hanok Village is a living neighborhood of traditional Korean houses.
  • DMZ & Joint Security Area - A sobering, highly organized tour of the border with North Korea. Book through a licensed operator. Passport required; no open-toed shoes.
  • Jeju Island - Volcanic craters, lava tubes, and the Olle Trail coastal path. Rent a car or use the intercity bus network.
  • Bulguksa Temple & Seokguram Grotto, Gyeongju - Masterpieces of Silla-era Buddhist art. The grotto has a strict no-photo policy inside.
  • Seoraksan National Park - Less crowded than Seoraksan, with dramatic granite peaks and cable cars for easy access.

Essential Foods to Try

  • Korean BBQ (Samgyeopsal/Galbi) - Pork belly or beef ribs grilled at your table. Order ssam (lettuce wraps) and ssamjang (soybean paste) on the side. Excellent in Seoul's Mapo-gu district.
  • Kimchi - Fermented and spiced cabbage served with almost every meal. Varieties include baechu (napa cabbage) and kkakdugi (radish).
  • Bibimbap - Mixed rice with vegetables and a raw or cooked egg. The Jeonju style is famous for seasoned soy sauce.
  • Tteokbokki - Chewy rice cakes in spicy gochujang sauce. A street-food staple, often sold with fish cakes and boiled eggs.
  • Sundubu Jjigae - Soft tofu stew with seafood or beef. Order it with a raw egg to crack in yourself.

Chimaek (fried chicken and beer) is a late-night ritual. Skip tourist traps in Myeongdong; eat where locals queue.

Best Time to Visit

Spring (March to May) and autumn (September to November) are the most comfortable seasons for travel. Cherry blossoms peak in early April in Seoul and Jeju. Autumn foliage is best from mid-October in Seoraksan and Naejangsan.

Summer (June to August) is hot and humid, with monsoon rains in July. Despite the heat, it is the season for beach trips to Busan and Jeju. Yeouido Island and Gyeongju are cooler alternatives.

Winter (December to February) is cold and dry. Seoul often drops below freezing, but the air is clear, and ski resorts near Pyeongchang are open for snow sports. Indoor attractions like museums and jjimjilbangs (public baths) are popular.

For fewer crowds, visit in late March or late October. Avoid Chuseok (Korean Thanksgiving, typically in September-October) and Seollal (Lunar New Year, in January-February) when many businesses close.

Packing Essentials

South Korea's four distinct seasons demand adaptable luggage. Layers for spring/autumn are vital: a light jacket, sweater, and scarf handle temperature swings from 8°C in early April to 22°C in late May. Heavy winter coat for December-February is non-negotiable; Seoul's wind chill can feel like -15°C. Comfortable walking shoes are essential for Seoul's hills and subway stairs.

Tech items include a T-money card for subway and bus taps (buy at any convenience store) and the Naver Maps app for accurate walking and transit directions. Your uPhone eSIM works on arrival. Pack a reusable shopping bag (plastic bags are charged). Bring a power bank for long days out. Leave space for K-beauty purchases; they are cheaper in Korea than online.

Common Questions

The details worth knowing about your South Korea eSIM

Yes, South Korean carriers have near-universal coverage in subways and underground spaces. On SK Telecom, KT, or LG U+, you should maintain connectivity throughout the metro network.

You may see reduced LTE coverage indoors and in some rural areas. SK Telecom and KT rely on band 5 for low-band reach. The other bands (B1, B3, B7, B8) still cover most locations with strong signals.

Which network your eSIM lands on depends on your provider. All three operators — SK Telecom, KT, and LG U+ — support the same 4G and 5G bands, so performance is generally very similar across them in South Korea.

This eSIM covers South Korea only. It will not work in North Korea. You can use it on Jeju Island without issue. In the DMZ, signal may drop near the border due to official restrictions, so expect limited connectivity there.

Yes, South Korea law requires identity verification for all SIM activations. When you install the eSIM, the provider will ask for a scanned copy or photo of your passport. Activation may be delayed until this is submitted and approved.

Use 1 GB for a short light-use trip, 3 GB for a longer stay with regular maps and messaging, or compare plans of 10 GB and above for streaming, video calls or work use.

SmartChoice links to the statutory coverage maps from SK Telecom, KT and LG U+. Use the map that matches the selected product's network information and check your accommodation and routes.

The start rule is product-specific. Review the selected plan details before installing it so you know whether any action is required before arrival.
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