Korea eSIM vs SIM vs Pocket WiFi: Real Prices Compared (2026)

By Gape · 9 min read · Published October 11, 2026

Some links in this guide are affiliate links: if you book through them, we may earn a commission at no extra cost to you. Details.

Quick answer: For most solo travelers, a Korea eSIM is the easiest pick: KT, SK Telecom and LG U+ all sell unlimited-data plans to visitors for ₩27,500 for 5 days, ₩35,000 for 7 days and ₩38,500 for 10 days (official prices, October 2026). A pocket WiFi router costs ₩4,400 a day and makes sense for groups or phones that can’t take an eSIM. Pick a plan with voice if you need a Korean number that can receive SMS sign-up codes; LG U+ says its data-only plans can’t.

Korea’s three carriers, KT (케이티), SK Telecom (SK텔레콤) and LG U+ (LG유플러스), each run a store for short-term foreign visitors. You can install the eSIM before you fly or collect a physical SIM or router at the airport. Prices below are from those official pages, with VAT included, checked on 10 October 2026.

Which is cheapest for a 5-, 7- or 10-day trip?

On the carriers’ own sites, unlimited data costs the same at all three for the most common trip lengths. The real differences are the extras (a Korean number, a transit card, palace tickets) and how fast the data stays.

The router row is KT’s ₩4,400 daily rate multiplied by the number of days. Airalo shows its prices in US dollars and they can change with promotions, so check the live price before you buy.

For short stays, KT and LG U+ sell a 1-day data plan for ₩6,500, and SK Telecom sells a 1-day data-only plan for the same price. Longer trips get cheaper per day: 30 days costs ₩71,500 at all three.

How much data do you actually get on “unlimited”?

Every plan above is sold as unlimited, but each carrier caps speed differently. Here’s what the official pages say today.

Many English guides still say Korean tourist SIMs slow down after 3 GB a day. That isn’t what KT, SK Telecom or LG U+ publish now. Maps, translation apps and social media fit easily within these limits. The one plan where a heavy user might notice the cap is a pocket WiFi shared by several people.

Hotspot is allowed: LG U+ says you can tether from its eSIM or SIM, and SK Telecom mentions a tethering cap only on its 5G plans.

Do you need a Korean phone number?

Only if you want to receive SMS verification codes. LG U+ says its data-only plans can’t receive them, and SK Telecom’s data-only plan gives you data only. KT is the exception: its data plans also come with an 010 number that receives calls and texts free once you verify your passport at a KT airport roaming center.

LG U+ spells out what a visitor number can and can’t do:

• With a voice plan, you can receive the SMS codes that restaurant-booking and taxi apps send when you sign up.
• Bank and government identity checks (본인인증) won’t work, even with a voice plan. These need a Korean resident’s phone contract.
• Data-only plans can’t receive SMS codes, and LG U+ won’t add voice to a data-only eSIM later. Decide before you buy.

Incoming calls and texts are free on KT and SK Telecom voice plans, but both make you verify your passport (여권 인증) first. SK Telecom lets you do it online through your email voucher between 08:00 and 22:00 after you’ve cleared immigration, or outside those hours at an airport roaming center. KT does it at its airport roaming centers.

Outgoing calls cost extra. SK Telecom charges ₩4.4 per second for calls within Korea and ₩33 per text, from a balance you top up. KT tops up from ₩5,500 to ₩55,000, and data keeps working when the balance runs out.

What does a pocket WiFi cost, and what do you need to pick it up?

A pocket WiFi (포켓 와이파이, KT calls it a WiFi Router) costs ₩4,400 a day at KT and from ₩4,400 at LG U+, and one device covers several people. The catch is the deposit card and the pickup trip.

• KT: ₩4,400 a day, or ₩55,000 for 30 days (each extra day over 30 adds ₩3,300, paid when you return it). Data is unlimited at 20 Mbps. At pickup you need your passport and a physical credit card in your own name with at least three months left before it expires. You can rent up to four routers per person.
• LG U+: from ₩4,400, with 4 GB a day at full speed. A free power bank rental is included. Up to 10 devices can connect at once. At the counter, a credit card in the same name as your passport gets a ₩1,111 authorization that isn’t actually charged. If you only have a debit card, LG U+ takes a ₩70,000 deposit and refunds it automatically when you return the router.

LG U+ picks up and returns at Incheon T1 and T2, Gimpo and Gimhae airports, and accepts walk-ins with a passport and same-name credit card. It says booking ahead gets you a discount. You return the router at one of those airport counters, and lost or damaged devices are charged.

KT’s Incheon Terminal 1 counters are on the 1st-floor arrivals level: near Arrival Hall A, opposite Exit 2 (06:00–22:00), and near Arrival Hall F, opposite Exit 13 (open 24 hours). In Terminal 2, Incheon Airport lists 24-hour counters for KT and LG U+ near Exit 4 and for SK Telecom near Exit 7, all on the 1st-floor arrivals level. KT also has counters at Gimpo and Gimhae.

How do you set up a Korean carrier eSIM?

Buy online, install from the QR code, and pay attention to when the clock starts. That last step differs between carriers.

1. Check your phone first. It must support eSIM and be carrier-unlocked (KT and LG U+ call this country lock, 컨트리락). A locked phone can’t use any of these plans.
2. Buy on the carrier’s official site. Each carrier gives you a QR code after payment (SK Telecom emails it as a voucher). KT and SK Telecom don’t accept Korean-issued cards, so pay with your home card.
3. Time the install. At KT, days are counted in 24-hour blocks from the moment the eSIM finishes installing, so installing it at home days early burns paid days. You have 90 days from purchase to install. LG U+ counts from your first data use in Korea and gives you 60 days from payment to activate. SK Telecom gives you 180 days from purchase to scan the QR code.
4. Install only once. KT allows one install per eSIM. LG U+ and SK Telecom say a deleted eSIM can’t be restored or refunded. Don’t remove it from your phone during the trip.
5. Turn off data roaming on your home line. KT warns that when the Korean eSIM expires, a phone with roaming switched on falls back to your home carrier’s roaming charges.
6. For a voice plan, verify your passport online (SK Telecom) or at an airport roaming center (KT) to switch on calls and texts.

Refunds are limited. KT and LG U+ don’t refund an eSIM once it’s paid for. SK Telecom refunds on the day of purchase only if the plan is completely unused; once the QR code is scanned, it refunds only if your phone turns out to be locked or doesn’t support eSIM.

Which should you choose: eSIM, SIM or pocket WiFi?

Match the option to your phone and your group, not the price, because the prices are nearly identical.

• Pick a carrier eSIM if you travel alone or as a couple and your phone supports eSIM. You keep your home SIM in place for bank texts, and there’s nothing to pick up or return.
• Pick a travel eSIM app such as Airalo or Yesim if you’d rather buy before you fly in US dollars or euros. These plans are data only, so compare the live price with the table above.
• Pick a physical SIM if your phone is unlocked but has no eSIM support. KT has you reserve online and collect it from its airport roaming center with your passport. Prices match the eSIM.
• Pick a voice plan (KT Data & Voice, SK Telecom Voice/Text, or LG U+ Data + Voice) if you want a Korean number for sign-up texts, or want restaurants and hotels to be able to call you.
• Pick a pocket WiFi if three or more people will share it, someone’s phone is locked or older, or you also want to connect a laptop. Budget for carrying, charging and returning it.
• Pick SK Telecom’s Royal Palace Pass plan if you planned to visit Gyeongbokgung (경복궁) and the other palaces anyway. The pass covers 12 sites, is valid for 12 days from first use, and must be used by 31 December 2026.

The free transit cards that come with some plans (KT Data & Travel, SK Telecom, LG U+ for 3+ days) are pay-per-ride cards (SK Telecom and LG U+ name T-money), not unlimited passes. Our T-money vs Climate Card guide explains whether you need a second card.

FAQ

Can I buy a Korean SIM card at the airport without booking?

For an eSIM, yes: KT and SK Telecom sell eSIMs at their airport roaming centers, and LG U+ rents pocket WiFi to walk-ins at Incheon, Gimpo and Gimhae. KT’s physical SIM is different: you reserve it online and collect it at the airport. KT’s counter near Arrival Hall F in Incheon Terminal 1 is open 24 hours, so late arrivals are covered.

Will a data-only eSIM work for Kakao T or Naver Map?

Both apps work over any data connection. The issue is sign-up: if an app asks for an SMS code to a Korean number, LG U+ says its data-only plans can’t receive it. Buy a voice plan if that matters to you.

Does KT’s eSIM start counting days when I install it?

Yes. KT counts usage in 24-hour blocks from the moment the eSIM finishes installing. Install it shortly before you land, or right after you arrive using airport WiFi.

How many people can share one pocket WiFi?

LG U+ says up to 10 devices can connect at once, but speed drops as more people stream. Its daily 4 GB at full speed is shared by everyone on the router.

Can I extend my plan if I stay longer?

Yes. KT extends eSIMs and SIMs in 5-, 10-, 20- or 30-day blocks, up to a total of 90 days from first activation. LG U+ lets you look up your plan on its website and extend or top up from there.