Korea eSIM for Tourists: Which Provider, and When to Buy

Even in these 483 eSIM-and-SIM threads, pocket wifi is named in 64, and a physical SIM in 52 (that one counts a single phrasing, so read 52 as a floor).

Check the phone first. It has to be carrier-unlocked, meaning not tied to your home provider: if it came on a contract, ask that carrier to confirm it's unlocked. It also has to support eSIM, which varies by model and by the market it was sold in. Look for an add-eSIM entry in your phone's cellular or SIM settings (on a Pixel: Settings > Network & internet > SIMs > Add SIM). Menu names differ by maker, so if you can't find it, check your maker's support page before ruling eSIM out.

Buy the plan on the provider's site or app and the QR code arrives by email or in the app. Scan it at home on wifi, and the eSIM sits idle until you land. Connecting is two switches in your SIM settings, both on the new Korean line: the line on, and its data roaming on. Leave your home line's data roaming off; whether to keep that line on at all for calls and texts to your home number depends on what your carrier charges for incoming roaming, so ask before you fly.

“Why would you pick up an esim? You just scan the QR code they send you.”

r/koreatravel · view thread →

Install it a few days before you fly: if the QR fails, or the phone turns out not to take an eSIM, there is still time to fall back. Installing early only costs you plan days if the clock starts at install, so check which trigger the validity terms name — purchase, install, or first connection.

Rather sort it on arrival? All three Korean carriers (SKT, KT, and LG U+) run roaming counters in the Incheon arrivals halls, but hours differ by desk: in Terminal 1 the 24-hour ones are near Arrival Hall F, and those near Arrival Hall A close at 22:00; in Terminal 2, KT and LG U+ at Exit 4 and SKT at Exit 7 run 24 hours. LG U+'s page says its Terminal 1 counter handles SIMs, eSIMs, and pocket wifi rentals; the item list at the SKT and KT desks we have not confirmed. Our airport guide covers the arrivals flow.

Counted across the 483 threads, post or comments.

Read those as ten separate figures rather than a league table: they were not measured the same way. KT collides with KTX and LG with the electronics brand, so both were counted only on explicit phrasings like "KT eSIM" or "LG U+", which is what "(floor)" marks. SKT was counted loosely, on any thread saying "SKT" or "SK Telecom".

Airalo's 32 threads include flatly opposite verdicts. We counted mentions, not sentiment.

“Ubigli worked well for me in Korea. Don’t use Airalo! Sucks in Korea.” (as written)

r/koreatravel · view thread →

“Never had a problem with airalo. What exactly are you warning us of?”

r/koreatravel · view thread →

That reply sits in a thread titled "Airalo esim in Korea -beware".

Some tourist plans are data-only; others add a Korean number. 109 of the 483 threads mention a Korean or local number. Data-only covers maps, translation, and calls over apps. What it can't do is receive Korean SMS codes or give a restaurant a number to call back.

“esim w a phone number. so you can use it for resto/cafe reservations” (as written)

r/koreatravel · view thread →

For a short trip run on walk-ins and app bookings, data alone does the job. You want the number for phone reservations and for longer stays. No reseller in the table is confirmed to sell one, and Nomad's help pages say its eSIMs are data-only outside Thailand. The carriers sell them, but not fully online. LG U+ lists its data-only eSIM as online-or-airport and its data-and-voice eSIM as airport-only, and the Tour Pass that carries an 010 Korean number is reserved on its website and collected at an airport counter, with passport details and a photo registered at purchase. SKT keeps calls and texts off until it has verified your passport, though data runs either way; where SKT sells its number plans we could not confirm. Buy the data part at home, and plan an airport stop for the number.

The number has a ceiling. LG U+ says its tourist number clears the SMS codes reservation apps send, and LG U+ and SKT both rule out identity verification for banking or government services.

No price table here, on purpose: these threads span 2021 to 2026, and what people paid moves by year, by data cap, and by promotion. What travelers reported paying, dated:

“I bought an eSIM (data only) from KKday and it was super cheap. 500 mb per day for 30 days for $12.50 USD.”

r/koreatravel · view thread →

“You could check on Ubigi (eSIM data only, sk telecom network). I’m currently on 25gb/30 days for 25$USD.” (as written)

r/koreatravel · view thread →

Those are a year apart and at very different caps, so treat them as the order of magnitude. Compare two or three plans on the same five things: data cap, validity days, after-cap policy (does data stop or just slow down), whether a Korean number is included, and the total price.

The cap is the hard part to judge from a spec sheet. One traveler put a number on it:

“For a 2 weeks stay, I used about 10GB with most of my usage coming from hotspotting my kids tablet, Kakao maps, uber, and doing a lot of researching.”

r/koreatravel · view thread →

That is around 700 MB a day with a tablet hotspotted off the phone: the 500 MB-a-day plan above would have run short, the 25 GB pool would have covered it. That is one person's trip, though, and usage isn't something we counted.