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Most guides to Korean eSIMs compare price and data speed. Those matter, but they are not what catches visitors out. What catches them out is the phone number: whether the eSIM comes with one, what it can receive, and whether a Korean app will accept it when it sends a verification code.
The answer is in the carriers’ own fine print, so I went to the source. On October 12, 2026 I read the visitor eSIM pages of all three Korean carriers, SK Telecom, KT and LG U+, and Apple’s list of carriers that support eSIM on iPhone. Prices below are the ones listed that day and will change. The rules around phone numbers change less often, and they are what this guide is about.
The short version
| What you need | Will a visitor eSIM do it? |
|---|---|
| Maps, messaging, browsing | Yes, any data plan |
| Calls and texts with a Korean 010 number | Yes, with a voice plan and a passport check after you arrive |
| Codes from restaurant or taxi apps | LG U+ says yes on its voice plans; check the others’ terms |
| Identity verification for banking, payments or government services | No. All three carriers say so |
Data-only plans: internet, and not much else
All three carriers sell a data-only eSIM you can buy online before you fly. The cheapest one-day LTE data plan was ₩6,500 at each of them. Data is unlimited with a daily high-speed allowance; KT, for example, says that after 11GB in a day the line keeps working at 5Mbps until midnight.
The catch is texting. LG U+ states plainly that its data-only plan does not support outgoing calls or texts and that SMS verification is not available with it. KT’s data eSIM still comes with a number (KT says all its numbers start with 010) and can receive calls and texts once you complete an entry check, but cannot send them, and cannot be topped up for voice later. If you think you might need to text a host or a restaurant, decide before you buy.
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Voice and text plans: a real 010 number, after a passport check
Each carrier also sells plans with calls and texts. At SK Telecom the cheapest was a two-day LTE plan at ₩12,000, sold online. KT and LG U+ sell their voice eSIMs only at their airport counters. KT lists a three-day data and voice plan at ₩23,500 with about 60 minutes of calls.
None of these numbers work fully the moment you install the eSIM. SK Telecom says incoming calls and texts start after passport verification and outgoing ones after you top up. KT says voice and SMS become available only after an identity check, which it calls an entry check, at its airport roaming center, and that one passport can verify only one number. LG U+ notes that the number will not even appear in your phone settings until you arrive in Korea.
The line all three draw: identity verification
This is the point most eSIM guides skip. Korean banks, payment services and government sites verify you through a phone-based identity check tied to your name, and the visitor eSIMs are excluded from it.
- LG U+: SMS verification for restaurant and taxi reservation apps works on its voice plans, but identity verification for banking or government services is not supported.
- KT: its eSIM page says KT eSIM does not support personal authentication.
- SK Telecom: its plan terms say receiving text messages related to personal authentication services and payments is not possible.
So a visitor eSIM gives you a Korean number that can receive ordinary texts, but not the kind of verification that opens a Korean bank app or many payment features. That system, and what foreigners living in Korea do about it, is explained in our guide to Korean identity verification for foreigners.
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Other fine print to read before you pay
- Short stays only. KT and SK Telecom both describe their products as for foreign visitors staying 90 days or less. If you are moving to Korea, a visitor eSIM is a bridge, not a plan.
- Your phone must be unlocked. KT and LG U+ both say the phone’s country or carrier lock has to be off.
- Install once. KT and LG U+ warn that a deleted eSIM cannot be reinstalled, so you would need to buy a new one.
- Some phones are excluded. LG U+ lists Google Pixel and OPPO phones as unsupported on its eSIM page, so check your model on the carrier’s list first.
- Korean cards are refused. KT says payment with credit or debit cards issued in Korea is not accepted, since the product is for foreign visitors.
- Dual nationals get data only. SK Telecom says holders of both Korean and foreign nationality can use data service but not voice or SMS.
On the iPhone side, Apple’s carrier support page, dated September 15, 2026, lists KT, LG U+ and SK Telecom as offering eSIM activation on prepaid plans for international travelers.
Which one should you buy?
If you only need maps, messages and translation, buy a data-only eSIM online and stop there. If you want to call a guesthouse, receive delivery updates or get codes from a taxi or restaurant app, buy a voice plan and leave time at the airport for the passport check. If you need Korean banking or a payment app that verifies your identity, no visitor eSIM will get you there, and it is better to know that before you land. When you do get a number, our guide to the Korean phone number format explains how to give it to people at home, and our Korean apps for foreigners check covers which apps to install with it.
Questions about Korean eSIMs
Does a Korean tourist eSIM come with a phone number?
Voice and text plans do, starting with 010. KT says its data eSIM also has a number that can receive calls and texts after an entry check. LG U+ says its data-only plan cannot send calls or texts.
Can I use a Korean eSIM for identity verification?
Not the visitor ones. LG U+, KT and SK Telecom all state that their visitor eSIMs do not support identity verification for banking, payments or government services.
Can I buy a voice eSIM before I arrive?
From SK Telecom, yes, online. KT and LG U+ sell voice eSIMs only at their airport counters. In every case the number needs a passport check in Korea before calls and texts fully work.
How long can I use a visitor eSIM?
KT allows up to 90 days in total, including extensions. SK Telecom also describes its products as for stays of 90 days or less.
All plan details, prices and quoted conditions come from the English visitor eSIM pages of SK Telecom (skroaming.com), KT (roaming.kt.com) and LG U+ (lguplus.com), read on October 12, 2026, and from Apple’s eSIM carrier support page. Carriers change prices and terms often; check the current page before buying.