Korea eSIM Compared: Kimchi Mobile vs Saily, Airalo & Holafly

For a short trip to Korea, Saily, Airalo, and Holafly all do the same core job well: a data-only eSIM you install before you fly, with no Korean phone number. Holafly and Airalo sell unlimited-data day passes; Saily and Kimchi Mobile sell capped GB plans that usually cost less for light use. Price is the easy part, because a tourist just wants cheap, reliable data, and any of these four delivers that. What actually divides them is what you need next: a long-stay resident eventually needs a real Korean 010 number, which no travel eSIM issues and which Kimchi’s KT bridge plans are built to set up later. This guide compares all four honestly, with sources, so you pick by your actual situation.

Last updated: June 2026. This is general information, not legal, immigration, or banking advice; confirm visa and ARC rules with the official sources linked below.

What’s the difference between a travel eSIM and Kimchi Mobile?

Saily, Airalo, and Holafly are international travel-eSIM brands that sell data in dozens of countries; their Korea product is a data-only roaming eSIM. Kimchi Mobile is a Korea-focused service: its data eSIMs do the same tourist job, and it also runs KT-network plans that bridge a long-stay foreigner to a real Korean number after their Alien Registration Card arrives. So the comparison is fair on data, but only one of the four has a path to an actual Korean 010 line.

That distinction matters because the two products answer different questions. “How do I get internet on my phone in Seoul next week?” is solved by any of them. “How do I get a Korean number my bank and the PASS app will accept?” is solved by none of the travel eSIMs, because a Korean number needs your physical ARC and a long-stay visa, not just a SIM. We cover that gap in detail below, and in depth in our pillar guide on how to get a Korean phone number as a foreigner.

Korea eSIM comparison: plans, price, and what you actually get

Here is the side-by-side as of June 2026. Prices and plan sizes change often, so treat these as a snapshot and check each provider’s live page before buying. The one column that does not change is the Korean-number column: only Kimchi’s bridge plans lead anywhere near a real 010 line.

Airalo’s South Korea unlimited plans run from about $12 for 3 days to $69 for 30 days, on the SK Telecom and LG U+ networks (airalo.com). Holafly’s unlimited plans are close, roughly $12.90 to $74.90 over the same range, with a fair-use cap on daily hotspot sharing (holafly.com). Saily and Kimchi sell metered GB instead, which is cheaper if you mostly use Wi-Fi and only need data on the move; Saily’s Korea plans start near $3.99 for 1 GB (saily.com), and Kimchi’s data eSIMs are $9.99 for 5 GB, $19.99 for 10 GB, and $39.99 for 20 GB.

Unlimited day passes vs metered GB: which is cheaper?

If you stream, tether a laptop, or post video daily, an unlimited day pass from Holafly or Airalo is the safer pick because you never watch a counter. If you mainly use hotel and café Wi-Fi and want data for maps, KakaoTalk, and rideshare when you are out, a metered plan from Saily or Kimchi usually costs less for the same trip. There is no universal winner; match the plan to how heavily you actually use mobile data away from Wi-Fi.

Do any of these eSIMs give you a Korean phone number?

No. Saily, Airalo, Holafly, and Kimchi’s data eSIMs are all data-only, with no Korean number and no Korean SMS or calling. That is by design, and it is the same for every international travel eSIM, not a flaw in any one brand. A Korean 010 number is a separate thing with its own legal requirements.

Korea registers mobile lines under a real-name, identity-verified rule. To open a number in your own name as a foreigner you need your physical Alien Registration Card (외국인등록증, ARC) plus a qualifying long-stay visa; the Ministry of Science and ICT (MSIT, 과학기술정보통신부) oversees this subscription and identity-verification policy. A data eSIM has no line in your name to register, so by definition it cannot pass that check. This is why no travel eSIM, however good its coverage, gets you a number Korean banks or the PASS app will accept.

The practical consequence: if you are visiting Korea, you do not need a number at all, and a data eSIM is the whole answer. If you are moving to Korea on an F, E, or D long-stay visa, you start on data too, then get your number later, once your ARC is in hand. Only Kimchi Mobile sells a product built for that second step.

The one path to a real number: Kimchi’s KT bridge plans

Kimchi’s Welcome SIM and Korea Starter SIM begin as a 60-day data eSIM, exactly like a travel eSIM, so you land connected. Within 60 days, once you have your physical ARC and a Korean bank account or card, you convert to a 12-month KT postpaid (후불) plan, and your real Korean 010 number is issued at that conversion. The number does not arrive on day one, and it does not arrive on the registration-fact certificate (외국인등록사실확인서); it needs the physical card. A travel eSIM has no equivalent step, which is the single biggest difference for anyone staying long term.

Which network does each Korea eSIM use, and does coverage differ?

All four run on Korea’s three national networks: KT, SK Telecom (SKT), and LG U+. Coverage across central Seoul, Busan, and the KTX line is excellent on all three, so in cities you are unlikely to notice a difference between providers.

Where networks diverge is in rural areas, on parts of Jeju, and in mountainous terrain, and that depends on which carrier the eSIM uses rather than the brand on the app. Airalo’s Korea eSIMs run on SK Telecom or LG U+ depending on the plan you choose (airalo.com); Kimchi’s plans run on the KT network. For a city trip any of these is fine. If you are spending real time in the countryside, pick a plan and check that specific carrier’s coverage map for the exact areas you will visit, because no provider is best everywhere.

What happens if the eSIM doesn’t work? Refunds and support compared

All four providers refund an eSIM you bought but have not installed; the differences show up after you install, and in how easy support is to reach in English. Read the refund terms before you buy, because “refund” usually means “before activation.”

• Airalo. Refunds are available for eSIMs that have not been installed or activated, and approved refunds may be issued as Airalo store credit rather than cash; once a plan is installed, it is generally non-refundable (airalo.com/help).
• Holafly. Refunds are possible for device incompatibility, a cancelled trip, or connection problems, processed back to your original payment method in about 5 to 10 business days, with up to six months to request (holafly.com).
• Saily. A 30-day money-back guarantee applies to unactivated eSIMs; after activation a refund is usually limited to cases of near-zero usage or a genuine connection fault (saily.com).
• Kimchi Mobile. A data eSIM can be refunded before you install it, and support is handled by a Korea-based team that answers in English and other languages, which matters when an activation question is time-sensitive and you are already in the country.

The pattern is consistent: install only when you are on the ground and ready, because that is the line most refund policies draw. The honest edge for a newcomer is less about the refund wording and more about who picks up when something goes wrong on arrival.

Which Korea eSIM should you pick?

Pick by your trip length and visa, not by the brand. The short version breaks down four ways.

On a short trip with heavy daily data, where you stream or tether a laptop, an unlimited day pass from Holafly or Airalo removes any worry about running out. On a short trip where you mostly sit on Wi-Fi and only need data for maps, messaging, and rideshare when you are out, a metered GB plan from Saily or Kimchi usually costs less; our 10GB Korea data eSIM covers a week or two of that comfortably. If you are moving to Korea on a long-stay visa in the F, E, or D categories, start on data and then get a real number, and here only Kimchi’s KT bridge plans connect those two steps, so you are not buying a throwaway tourist eSIM and starting over. And if you are not sure your visa even qualifies for a Korean number, ask before you buy, since a data eSIM is always safe while the number depends on your ARC and visa.

No single provider wins every row, and we have tried to be straight about that. For pure tourist data, the travel-eSIM brands are strong and so is Kimchi’s data line. For the day you need a Korean number, the comparison stops being close.

Verify it yourself (official sources)

Prices and immigration rules move, so check the primary sources before deciding anything that depends on them:

• Mobile identity verification. The Ministry of Science and ICT (MSIT, 과학기술정보통신부) oversees mobile subscription and real-name verification policy in Korea.
• ARC and the 90-day rule. The Korea Immigration Service and the HiKorea portal cover alien registration, eligibility, and appointments.
• Provider pricing. Confirm the current plan and price on each company’s own Korea page (linked above) the day you buy, since promotions rotate.

If your visa situation is unusual, the Foreigner Information Center can be reached at 1345 inside Korea.

Frequently asked questions

Does Airalo, Saily, or Holafly give you a Korean phone number?

No. All three sell data-only eSIMs for South Korea, with no Korean number and no Korean calls or SMS. A real Korean 010 number requires your physical Alien Registration Card and a long-stay visa, which no travel eSIM provides. For a short trip you do not need a number; a data eSIM is enough.

Which is cheaper for Korea: Saily, Airalo, Holafly, or Kimchi Mobile?

It depends on how much data you use. Holafly and Airalo sell unlimited day passes that are best for heavy users, running roughly $12 to $75 for 3 to 30 days. Saily and Kimchi sell metered GB plans that usually cost less for light-to-moderate use, with Kimchi’s data eSIMs at $9.99 for 5GB up to $39.99 for 20GB as of June 2026. Check each provider’s live page, since prices change.

Can a tourist get a Korean SIM with a phone number?

Not a real one that passes Korean identity verification. Tourists and short-term visitors cannot get a Korean 010 number because that requires an Alien Registration Card, which short stays do not register for. A data eSIM gives you internet on your passport with no number, and it is all a visitor needs.

Which Korean network do these travel eSIMs use?

They use Korea’s three national networks: KT, SK Telecom, and LG U+. Airalo’s Korea plans run on SK Telecom or LG U+ depending on the plan, and Kimchi Mobile runs on KT. Coverage is excellent for all three in cities; differences mainly appear in rural areas and parts of Jeju, so check the carrier’s coverage map if you are leaving the cities.

Can I get a refund on a Korea eSIM if it doesn’t work?

Usually only if you have not installed or activated it. Airalo, Saily, and Holafly all refund unused eSIMs, and Holafly also covers device incompatibility and connection faults within its window, while Saily offers a 30-day money-back guarantee on unactivated plans. After activation, refunds are limited, so install only when you are ready to use it.

I’m moving to Korea long term — which eSIM should I buy?

Start on a data eSIM so you land connected, then plan for a real Korean number once your ARC arrives. Travel eSIMs from Saily, Airalo, and Holafly cover only the data step. Kimchi’s Welcome SIM and Korea Starter SIM start as a 60-day data eSIM and convert to a KT postpaid plan within 60 days, issuing your 010 number at that conversion, so you do not buy a tourist eSIM and then start over.

Do I need a Korean number for KakaoTalk, banking, or the PASS app?

You can use KakaoTalk over data without one, but Korean banking, fintech apps like Toss, the PASS app, and government services expect a postpaid line registered in your own name on your ARC. A data eSIM has no number, so it cannot complete those identity checks. That verified number is the reason long-stay residents eventually move past a travel eSIM.

Is the 외국인등록사실확인서 enough to get a number instead of the ARC card?

No. The registration-fact certificate proves your registration is in progress, but to activate a Korean number through a bridge-to-postpaid plan you generally need the physical Alien Registration Card. Stay on a data eSIM until the physical card is in hand, then convert.

Choosing the right Korea eSIM for your trip

The comparison comes down to one question: are you visiting or staying? For a visit, Saily, Airalo, Holafly, and Kimchi’s data eSIMs all deliver solid Korean data, and you choose between an unlimited day pass and a cheaper metered plan based on how heavily you use mobile data. For a long stay, the field narrows, because only Kimchi’s KT bridge plans carry you from data on arrival to a real Korean number after your ARC.

If you are visiting, start with a Korea data eSIM sized to your trip and install it the moment you land, or browse the full range on our shop if you want to compare sizes first. If you are moving to Korea on a long-stay visa, begin on data with a bridge plan and convert to KT postpaid once your ARC and Korean bank account are ready, so your 010 number lands at the right time. And if you are still not sure which fits your visa, ask before you buy.