I’ve used Billion Connect for multiple eSims abroad now, and I’ve found them great every time. Their customer service responds pretty quickly to any issues, and the sims are cheap and work well. Be aware the sims are mostly based in Hong Kong so if you’re geographically far from there the latency might be a little high, and you may need a VPN for things like TikTok to work, but I’ve had very few issues.

Jun 3, 2025

Giga.Tel

iTravelalotyesindeedused in South Korea 🇰🇷

Beware: 1) No call/text available in South Korea. 2) Routed via HK so not the best service due to latency, but the same as most competitors in SK for eSIM. 3) Weird discrepancy on their website about price in USD vs charged amount ($1.00 USD more is charged than shown online). How do I know? I bought 3 eSIMs from Giga.Tel in South Korea, and over 10 from eSIM competitors. So far they are still the cheapest for the same 30GB and quality of service. Plus you can checkout with American Express in case of a dispute (MobiMatter does not allow Amex)

May 26, 2025

TravelGator eSIM

Erisused in South Korea 🇰🇷

As soon as I land in a new country, it’s just a few simple steps to activate the eSIM—and I’m instantly connected!

The connection is way more stable than my original telco’s roaming, and best of all—no more swapping SIM cards or re-adding eSIMs every time I travel.

Definitely a game-changer for frequent travellers like me! 😊🌍

May 22, 2025

airdatalink

Shannonused in South Korea 🇰🇷

I went with this esim because of the great value and because I saw a positive review (after having tried a couple esims in the past with various companies that barely worked, I'm always a bit apprehensive to try one without and positive reviews) and I just wanted to second that review - airlink worked perfectly throughout Korea (have been connected to SK network the whole 3 weeks) and when considering price per GB, I doubt there are many better options.

May 12, 2025

LinkeSIM

Claudeused in South Korea 🇰🇷

Sim does not work for data in Korea. They also claim 24/7 support but they haven’t been online for the last 6 hours. Avoid company, I was left without any internet access when I landed and had to scramble poor free wifi to buy a different eSIM.

They still have not refunded me going to have to file a charge back. Avoid at all costs

Apr 2, 2025

MicroEsim

Michaelused in South Korea 🇰🇷

SIM was very slow. Could barely hit a few MBPs a second.

Mar 31, 2025

Saily

TartarMEused in South Korea 🇰🇷

Installation, price, set up was as easy as you can get. However, the speed in South Korea was abysmal (I had better experience in other country).
Usually slow but usable, but at times you opened Google Maps and it wouldn't even finish loading your "pins". So stressful to use, up to the point that one friend with the same SIM got himself a different one during the trip and I hopped Free Wi-Fis. Not what I bought this SIM for!

Nov 15, 2024

Airhub

jamieused in South Korea 🇰🇷

I purchased an eSIM for my travel to South Korea. On their website, they say it 'operates on the SK Telecom Network in South Korea'; however, all traffic is routed to Hong Kong, which caused very slow 3g speeds and made it impossible to use some apps like ChatGPT.

May 29, 2024

GLOBAL YO

Merryused in South Korea 🇰🇷

I bought two eSIM for Korea, one registered fine and worked but the other one did not register.
So I tried to contact them for help but there is no response ever.
I thought this was a good deal but it is not.
Try to avoid Global Yo as you won’t get any help or refund for your failing eSIM.

May 26, 2024

GLOBAL YO

Johnused in South Korea 🇰🇷

The esim doesn't work, can't register to network

May 2, 2024

GlobaleSIM

Love_eSIMused in South Korea 🇰🇷

I was hesitant at first, but I am glad that I made the purchase!

I am really happy that I was able to have data connection anywhere I go. I recommend this esim if you are traveling and wanted to have an awesome roaming connection.

Sep 28, 2022

Airhub

Laurused in South Korea 🇰🇷

Excellent customer service at Airhub.
Thank you for the amazing support!

Sep 27, 2022

Frequently Asked Questions

How many travel eSIM brands (providers) are available for use in South Korea, and how many prepaid data plans are there?

There are more than 100 travel eSIM providers and over 4,000 prepaid data plans available for South Korea. With thousands of plans on offer, travelers have a wide variety of options to choose from.

Are there any unlimited data eSIM plans available for South Korea?

Yes, several eSIM providers offer unlimited data plans that can be used while traveling in South Korea. The available plans cover a variety of validity periods, from one day to sixty days, and the price range for all unlimited options spans roughly from $0 USD for the free Firsty plan to about $70 USD for the most extended offers. Most of these unlimited plans come with a speed limitation or a potential throttle—Firsty limits speed to 256 kbps, while other providers cap speeds at around 5 Mbps or may simply throttle bandwidth after a certain amount of usage. Some plans also allow tethering, and they support modern networks such as 4G, 5G, LTE, and 3G where available. Since the plans are sold by independent eSIM platforms, travelers can select the provider and validity that best matches their stay length and data‑usage expectations.

What are the major mobile networks available for a travel eSIM in South Korea?

SK Telecom: The largest wireless carrier in South Korea, offering extensive nationwide coverage and a wide range of mobile services.
KT Corporation: A major telecommunications provider delivering comprehensive mobile services and playing a significant role in the development of 5G technology.
LG Uplus: A prominent mobile network operator known for its advanced network infrastructure and diverse mobile service offerings.

In addition to these major Mobile Network Operators (MNOs), South Korea has a growing number of Mobile Virtual Network Operators (MVNOs). MVNOs provide mobile services by leasing access from the major carriers, offering consumers alternative options. Notable local MVNOs include EyeVision Corp. and Sejong Telecom Inc. However, it's important to note that most travel eSIMs rely on the infrastructure of MNOs rather than MVNOs.

Summarized by Gen AI. Last updated: September 16, 2025