Travel South Korea with world-class eSIM coverage on SK Telecom, KT, and LG U+. Seoul, Busan, Jeju Island, Gyeongju, and DMZ tour routes covered. Activate before boarding — some of the world's fastest 5G networks await.
5G ready Hotspot included Keep your home line 24/7 humans
Change your mind within 7 days and we refund in full — as long as the eSIM is unused or under 100 MB, so you can install it and check it connects first. A plan that genuinely fails is refunded any time. Details.
Pick data amount and validity. Pay with card, Apple Pay, or Google Pay.
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Scan the QR code
We email a QR code instantly. Scan it in Settings — installed in under 60 seconds. No app needed.
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Land online in South Korea
Your phone connects to local networks automatically when you arrive. No SIM swap, no kiosk. Hotspot included.
Network
Coverage & connectivity.
Networks we run on in South Korea
LG U+5GSKTelecom5G
Your device connects to the strongest available network automatically — no manual setup.
Seoul Busan Incheon Daegu Daejeon Gwangju Jeju City Suwon Gyeongju
South Korea has one of the world's most advanced mobile networks — SK Telecom, KT, and LG U+ each offer nationwide 5G with near-100% 4G population coverage. Seoul has blanket 5G including in the Seoul Metro subway system (all underground stations covered). Busan, Jeju, Incheon, Daegu, and Daejeon all have strong 5G. The KTX high-speed rail between Seoul and Busan has full 4G/5G throughout. Jeju Island has complete island-wide 4G with 5G in Jeju City and major resort areas. The east coast (Sokcho, Gangneung) is fully covered. Seoraksan and Jirisan National Park hiking trails have 4G in valleys; ridge trails above 1,000m may thin to 3G.
Plan size
How much data do you need?
Pick your travel style and trip length — we'll suggest the right South Korea plan, no guessing.
Yes. South Korea is famous for maintaining full 4G/LTE and growing 5G coverage throughout all Seoul Metro underground stations and tunnels — a rarity even in advanced countries.
Will this work in Jeju Island?
Yes. Jeju has island-wide 4G coverage with 5G in Jeju City and major resort areas. Hallasan summit trail has coverage on lower sections; the summit crater area may be variable.
How does South Korea compare to Japan for coverage?
Both are top-tier. South Korea has faster 5G deployment and stronger subway coverage. Japan has wider rural reach in mountain areas. For cities, South Korea is arguably better.
Is the eSIM cheaper than buying at Incheon airport?
Yes. Airport eSIM kiosks charge a premium for convenience. Flysimio is typically 40–60% cheaper and activates before you land.
Can I use this at the DMZ?
Yes in the DMZ tour areas accessible to tourists (Imjingak, Third Tunnel, Dora Observatory). The North Korean side of the border has no coverage, but South Korean tourist areas do.
What is an eSIM?
An eSIM (embedded SIM) is a digital SIM built into your phone. Instead of a physical card, you scan a QR code and your plan installs instantly — no SIM tray needed.
Is my phone eSIM-compatible?
iPhone XS (2018) and newer, most Android flagships from 2020+, and all Samsung Galaxy S21+ devices support eSIM. Check our compatibility page for the full device list.
How do I install the eSIM?
After purchase, we email a QR code. On iPhone: Settings → Cellular → Add eSIM → Scan QR Code. On Android: Settings → Network & Internet → SIMs → Add eSIM. The whole process takes under 60 seconds.
Can I keep my regular SIM while using this eSIM?
Yes. Most phones support dual SIM (physical + eSIM). Keep your home number for calls and SMS — use Flysimio for data abroad. You control which SIM handles what in your phone Settings.
Does the eSIM include a hotspot (tethering)?
Yes, all Flysimio plans include mobile hotspot at no extra charge. Share your data connection with laptops, tablets, or other devices freely.
What happens when my data runs out?
You can top up data from your account dashboard at any time. Top-ups are applied instantly — no need to buy a new eSIM or wait.
Can I get a refund?
Yes. We offer a full refund within 7 days of purchase. Contact contact@flysimio.com with your order number.
How long is the eSIM valid for?
You have 6 months from your purchase date to activate the eSIM. Once activated, the plan validity period (e.g., 7 days, 30 days) begins counting down.
Will the eSIM work at the airport when I land?
Yes — as long as you installed the eSIM before your flight, it activates automatically when your phone connects to a local network on landing. No Wi-Fi required for activation.
What if the QR code doesn't scan?
If the QR code won't scan, you can enter the activation code manually — we include both in the email. You can also contact our 24/7 support team and we'll resend or manually provision your eSIM.
eSIM in South Korea
The complete guide.
Best eSIM for travel to South Korea
The best South Korea eSIM taps into some of the world's fastest 5G, with clear pricing and instant setup. Flysimio runs on SK Telecom, KT, and LG U+ — each offering nationwide 5G from Seoul and Busan to Jeju Island — including full coverage in the Seoul Metro and along the KTX bullet train. Plans are prepaid with no contract and no roaming surprises: choose your data, pay once, done. Your QR code arrives by email seconds after checkout and installs in under a minute, every plan includes free mobile hotspot, and a 7-day money-back guarantee has you covered. Land at Incheon already connected — no airport kiosk queue.
How to set up a South Korea eSIM (step by step)
Getting online in Korea takes about two minutes. First, confirm your phone supports eSIM — iPhone XS (2018) and newer and most Android flagships from 2020 qualify. Choose your South Korea plan on Flysimio and pay with card, Apple Pay, or Google Pay; your QR code arrives by email within seconds. On Wi-Fi before you fly, open Settings → Cellular → Add eSIM (iPhone) or Network & Internet → SIMs → Add eSIM (Android) and scan it — a manual code is included too. Keep your home line as default until arrival. When you land at Incheon, Gimpo, or Jeju, your Flysimio line connects automatically to a Korean network — no kiosk, no physical SIM, no queue.
How much data do you need in South Korea?
Most travellers over-buy. For maps, messaging, and email, roughly 300 MB a day is plenty, so a 3–5 GB plan covers a week in Seoul comfortably. Add social media, photos, and music and you'll want about 700 MB a day — a 10 GB plan suits a two-week trip taking in Seoul, Busan, and Jeju. Korea's networks are fast, so streaming is effortless: if you'll watch a lot of video or tether a laptop, plan for 1.5 GB or more per day or choose an unlimited daily plan. Use the calculator above to size it, and you can top up mid-trip if you run low.
Using a South Korea eSIM on iPhone and Android
Flysimio runs as a second line beside your usual SIM, so you keep your home number for calls and texts while your Korean data flows over the eSIM — standard dual-SIM behaviour on iPhone XS and later and most Android phones from 2018. After installing, set the Flysimio eSIM as your cellular-data line and turn on Data Roaming for that line only; it simply lets the eSIM connect to Korean networks, with no roaming fees. Keep your home SIM on for messages and calls, or switch it off to avoid your own carrier's charges. If you're unsure about your model, the compatibility page confirms it before you buy.
Hotspot, calls, and texts on a South Korea data eSIM
Every Flysimio South Korea plan includes mobile hotspot at no extra cost and without throttling, so you can tether a laptop or tablet or share with a travel companion and use your full allowance freely — easy on Korea's fast networks. As a data-only eSIM it has no Korean phone number, but that rarely matters: KakaoTalk, WhatsApp, FaceTime, and Google Meet handle calls and messages over data, and your home number stays reachable on your primary SIM. You stay connected from the Seoul subway to Jeju without the per-minute charges of traditional roaming.
Short South Korea trips vs. long stays
For a few days in Seoul or a quick business trip, a small 1–5 GB plan on a 7-day validity is the most economical choice. For a two-week trip through Seoul, Busan, and Jeju — or a longer stay — a 10–20 GB plan or an unlimited daily option lets you navigate, stream, and work without watching a meter. Because Flysimio gives you six months to activate, you can buy before you leave and the validity only starts when your eSIM first connects in Korea. No contract, nothing to cancel — the plan stops when it's done, and you can top up or rebuy for your next trip.
