Great SIM and value. 10GB of unthrottled data (data can still be used after) for 15 days. To extend, just use the app and pay an extra fee.  It was the only Sim I could find that allowed top-up and had a 15 day option (instead of 10 and 30) so this was a no brainer. There's also free access to KT wifi via KR SIM customer service, which is a Lifesaver when you exceed the 10GB and want to watch videos on long train rides! Re VOIP calls, FB calls work.

The counsellor on Facebook messenger is always ready to answer. Unbelievable. That is so impressive.

Mobile internet service quality is second to none. outstanding! Never experienced anywhere.

The best sim as far I know. Ive never found more attractive South Korea prepaid SIM than this. Recommended.

Korea Sim went above and beyond to help me during my trip. I had purchased a Blue LTE sim which for some reason would only connected to 3G. After various failed attempts to connect to the LTE network, I was content with using the 3G network for the rest of my trip but was told by staff that I paid for LTE and deserves to use LTE. They went out of their way to reset the values for me and by day two I was on the LTE network! Definitely recommended!

외국에서 친구 올 때마다 하나씩 선물합니다. 전화번호, 통화도 할 수 있어서 한국 내에서 꼭 붙어 있을 필요도 없이 서로 연락하기 딱입니다. 데이터 속도에 감탄들 합니다. ㅋㅋㅋ

So fast service and very friendly! U Can ask help anytime! It saves my day! Thanks a lot!

I tried to activate the SIM by online at '4AM'. And it was done immediately!! It must be an automatic process.

If the advance purchase makes you nervous,

www.facebook.com/krsim

Please use this message.

This page message away my anxiety.

Use the data without limits, but with no additional charges.

The speed is also good.

韓国にしきりに遊びに来ているが、いつもここにショッピングモールを利用しています。

今回新しく出たblue sim cardを使用してみたけど本当によかったです

旅行を本当に楽に作ってあげました。

I was really worried before the purchase.

Blue card is because international calls are impossible.

But if you connect to Wi-Fi, you can use skype.

This is enough :)b

And I have no regrets.

It was easy to find the booth for the simcard. The internet was fast and the signal was good, even in areas outside Seoul. Will buy again when I go to Korea soon.

This is really great.

I forgot prepaid sim card and ordered it 4 hours before I left.

Frankly, I knew I couldn't play pick-up

But I could get a sim card when I arrived at Incheon Airport in Korea!!!!

If you have a problem, try using Facebook messages.

Krsim company service is incredible.

I really want to recommend

Trust me!!!!!! :)

For your information, I bought blue sim card.

Trust in the product and buy it. You'll feel comfortable traveling.

The customer service is excellent.

The product is also very good.

kkkk:)

Fast service and data card works just fine. Confirmation email came quickly too and directions/ instructions were very clear. Satisfied customer.

Thanks Krsim.net for providing such service! It was hassle free. I will definitely use krsim in the future!

This data plan was awesome! Super recommended for South Korea travelling. With high speed internet, you can post your photo and video to social media without worry in anywhere anytime whenever you like!

I picked up the SIM card seamlessly at Incheon Airport. The SIM was working perfectly throughout my stay in Korea. Speed was consistently good (LTE). Highly recommended!

It was easy to purchase and redeem the SIM. krsim facebook message is fast in responding your question.

光是比現場購買便宜就值得推薦了，一下飛機直接找櫃檯處理，抽完號碼牌、拿卡、測試ok、走人，在韓國已經用了四天，網速不錯

No hassle and worry-free. Easy pick up at the airport and no data distruption in all locations I've been. Super convenient and worth the price.

I was looking for an international sim card.

International call is really really reallyreallyreallyreally cheap here.

Does it make sense to call the United States at one won per second?

That's amazing....

Card has been great easy pickup at airport glad i found korea red card  for this. Their all is easy as well

The internet speed is very stable and fast enough to stream any video online i.e. youtube, netflex with no issue. Highly recommend to use it during travel in Korea.

Really nice experience! The internet is really fast and easy to use. And the staff is helpful.

Great one!! I got the confirmation that provides me with clear instruction to get the SIM card at Incheon Airport. And the SIM card is with fast speed.

Very good experience. It is very convenient and easy to take the card. With good speed!!!!

The signal is 4G LTE and i really loved it.. When my friend are keep looking for the public wifi, i can keep calm because this sim card really useful.. Furthermore, its more affordable than rental the portable wifi if you are travelling alone for a long time.. <3<3<3<3<3<3<3<3<3<3<3♡

Great one!! I got the confirmation that provides me with clear instruction to get the SIM card at Incheon Airport. And the SIM card is with fast speed.

スピードも問題なくスムーズで、とてもよかったです。 毎回つかいます。値段も少しだけここの方がやすいです。

Surf everywhere. You will find yourself buying here. :)

convenient to order and collect the SIM card from the airport counter. No need to explain in English/Korean with the staff.

Awesome!

The unlimited data came in helpful especially when you are separated from your group or friends when walking around and needed to google or call them (whatsapp).  Other than that, krsim has provided a splendid experience for us.

일본에서 생활하다가 잠깐 한국에 들어왔어야하는데 SIM 카드가 마땅치 않았어요.

근데 무제한 심카드는 한국 여권으로도 사용 가능하다고 해서 구입했어요~ㅋㅋ

역시 Kt 상품이라 그런지 불편함없이 30일 다 쓰고 출국하네요 ^^

다음에 올때도 이ㅛ용할게요~

訊號品質十分穩定，人多處收訊狀況也良好，非常方便！

Really reliable. No issues and very easy and fast to claim.

This is the cheapest place to go

The procedure of collecting the pocket wifi is easy, the speed is super fast enough.

Process was easy.They did not need to assist us with putting up the sim because it was ready use.

Super fast transaction, we just showed the voucher and I picked up the SIM. Amazing data connection anywhere.

The transaction ran smoothly. You just have to talk to the KT rental counter and show the voucher (sometimes, the sim card is not available in all counters tho). If the sim card is not available, the lady at the counter will tell you in what counter number can you exchange your voucher so everything is still smooth. P.S. No need to print the voucher.

Very easy to locate and good service. definitely will buy again.

The product was great! We did not encounter any hassle in claiming the item from the airport and even when we are using it during our stay in Seoul.

Easy pick up, good and stable network speed. I’d definitely recommend.

International phone is cheap

The product was expensive, but I was satisfied because 4G LTE was really fast,,

The KT is great always full signal !b   I will buy again when I visit South Korea.

This is the best mobile WiFi I have used. Redemption and return was easy. Connection had been good for all 5 days I’ve used it. Battery lasts the whole day, longer even!

easy pickup and quality of service. would recommend for other travellers. easy payment and recommended by others.

Very good internet connection with no difficulty in settings up The stuff also very friendly

The SIM card was very reliable wherever I went and I loved the unlimited data usage which provided me with a peace of mind that I am connected anywhere during my visit in Korea!

I have used this plan many times already. The pick up service is really convenient and fast. I recommend this for people who uses a lot of data.

I picked up the SIM card seamlessly at Incheon Airport. The SIM was working perfectly throughout my stay in Korea. Speed was consistently good (LTE). Highly recommended!

it was convinient to receive and easy to use. the booth was well located and the activation was easy. the data speeds are very fast.

スタッフはとても良かったです。

そして旅行する上で大変役になった。

So gooood :)

Definitely  going to order again next time

Great :)

Very easy and get from the airport and worked with no problems at all.

Perfect, fast connection

☆ I would like to commend on the excellent customer care service delivered by the company for their patience, sincerity and dedication throughout 2 full days of constant trouble shooting n follw up to help me connect with my teenage child in Korea. ☆

This sim card worked well in Korea, fast connection, very convenient to looking for places, getting information, and connecting with friends easily

Facebook Message customer center is really great.

I used it and feel very good, fast.

This sim card service is excellent, but hope there can have more day selection for foreigners. Recommend for all who want visit Korea.

it's convenient to buy a SIM card in advanced, just need the e-receipt and going to KT counter right after getting out of the arrival hall and you can get your 4G simcard. Very quick & easy!

I have used this plan many times already. The pick up service is really convenient and fast. I recommend this for people who uses a lot of data.

This is the best plan I found for unlimited data. The internet is really fast and I really enjoy using it! I will order this again.

The network speed is really really good. Highly recommended to get this during trip to Korea.

This data plan was awesome !With high speed internet, you can post your photo and video to social media without worry in anywhere anytime whenever you like!

The sim card is worth the price. The connection is very reliable & fast

The Sim card is a must for traveling. It makes everything so much easier! The pick up was easy.

It's very convenient for tourists. I like this SIM card, and definitely will recommend it to my friends.

The SIM card worked perfectly and without any problems. 100% worth every penny, I can recommend it to travellers who need a reliable Internet during vacations!

Thật sự rất hay GOOD!

The price of the product is high, but the international calls are really cheap.

Buying the product was a good choice.

The experiment is excellent. I have preordered my Korean sim card from home. It was ready at arrival when I checked in at the KT stand at Incheon.I am going to repeat this experience next time I come to Korea

You don't need to print out the voucher, you just need to show your voucher to the pick up counter. Pick up counter is easy to find.

Quick, simple and reliable

Easy to locate. Setup pretty straightforward and no fuss. 4G speed was fast and unlimited as advertised. Very satisfied. :)

Finding a pick-up point at the airport was very simple.

Overall, I'm satisfied with it.

It's fast, and international calls are cheap.

Would suggest to get this SIM card instead of the egg wifi as it’s unlimited and may access to internet anywhere anytime 24/7.

Easy step to get the sim card in airport... KT staff very helpful to setting the simcard with our phone.. No poor receiving problem even in Jeju!

Good and smooth data. Convenience and easy to use, no need set up. But queue long while waiting for collect:)

We got the SIM card successfully without any hassle. And used the SIM card on my own wifi egg for family used. Unlimited data is the best!!!

Extremely convenient to redeem in the airport. Superb connection throughout my whole entire trip. Would love to recommend this to anyone who's gonna visit Korea!

Perfect data plan for travel in Korea. It is very convenient to be picked up at Incheon airport upon our arrival.

Cheaper than purchase at the local KT Olleh counter. Simple and quick when collect the sim card.

Super easy and reliable. Pickup of sim cases directly at the airport with very little waiting time. Would book it again next time I'm in Korea.

Ordered online before our Korea trip. Price was cheaper than market price. Highly recommended!

在機場領取很方便，沒有流量限制可以安心上傳照片和影片，隨時分享旅行的時刻，大推！

You can easily get your sim card at arrival hall. The speed is very good and you can access it almost everyway in Korea.

Easy to use and fast connection. Great values! Especiallly the price is very cheap and no Extra costs... Nice

It has been good so far the network the internet the staff at the airport. Really appreciate the simcard and the Kr sim company.

The network speed is really really good. Highly recommended to get this during trip to Korea.

It took some time before I got it working. Overall, excellent service. The connection and speed is great. Highly recommended.

Fast Speed and great coverage. Highly recommended!

Very stable network. Good value for its speed and stability. Will buy again when coming to Korea.

Sim Card was good and at an affordable price! Counter was easy to find and the staff there was friendly and able to communicate in English as well. Will definitely go back to buying this Sim Card in the future!

Fast and super efficient connection. Very cheap considering the unlimited data included with the sim.

Travelers should really get this instead of purchasing in Seoul! It's cheaper (with discounts), and super convenient! Collected my SIM card and started using it in less than 5 mins after I arrived! (:

very convenient to use! staff knew what i wanted, no difficulty due to language barrier

We picked up the sim at the airport. The service is quite fast despite the peak hours! We were also allowed to try the sim in different gadgets and they even offered to help us out. Will avail again!

Good connection with fast speed! It's easy to pick up at the airport and the staff are helpful too. If you're having trouble changing the SIM, you can ask for help there! It's much more convenient than using a wifi egg. Will definitely recommend you using it when you're in Korea.

The redemption process was a breeze! The staff at the counter was very patient with us although we forgot to check the size of the SIM card before approaching the counter.

Great experience... Will book again when we visit seoul

I'm very satisfied with the easy pickup at the airport and the speed of the card :)

I always use this service whenever I go to South Korea.

Having unlimited data to stay connected to social media wherever I go! Keeping my love ones updated with all the amazing places I have been in Korea!

You can buy SIM CARD at Incheon Airport.

But it was much cheaper to live online.

I recommend you to buy here!! ;-(

Perfect data plan for travel in Korea. It is very convenient to be picked up at Incheon airport upon our arrival.

It is very efficient and fast. Good deal! I am always connected and can easily use my social media.

excellent 4G connection as always! very convenient and user friendly. Will always purchase this SIM card whenever i go to Korea

The SIM card is very helpful to me in my Korea trip. It's really unlimited and high-speed internet. Also the place to get the SIM card in the airport is quite easy to find.

Good service. Detail guidances. Easy to collect sim card. Very helpful! Thank Krsim. I will use krsim services next time and refer my friend!

It was good! There was no issue in showing the voucher and getting the sim card. The person at the counter had the pin and helped to put in the sim card too.

Great customer service, replied to my queries immediately. Went to Seoul, Jeonju, Busan, and had no issues with reception. I was able to use my phone as a hotspot and tether from other phones too. There was an issue accepting my payment via credit card on the site, but I was able to use PayPal with no issue.

The service was great! Went to the booth to collect my SIM card, the staff were polite and friendly. The provide fast services and provided help in the SIM installation. My friend had trouble receiving the network, the helped and in the end got it done for us.

It was easy to install and there is no any problems when browsing internet and using Google Map for direction. The data is very good and can access everywhere in Seoul.

Amazing service! Fast n convenient~~must use Krsim product every time when I travel as a backpacker!!

It's too fast.

這是第一次用這個卡，這5天首爾釜山都有去，收訊真的很好，以後去一定會再使用♡

It was very fast and easy to obtain, helped us a lot in regards to navigating and exploring more remote neighborhoods and trains

Smooth and quick process of getting the sim card upon reaching airport. Connection and signal were all good!

simple and easy.after received voucher. i print it and show to busan related counter then they ll settle all...wifi fast and good connection

真的很方便也很好用!!也超級划算~我10天無限亂用~真的下次一定會再繼續購買!!

Very convenient and reliable. The card could be collected from the counter near the exit of Arrival lobby of Inchoen Airport and easy to install.

訂購流程非常快速方便，價格也不會太貴，非常推薦，下次若有需要也要再次購買

it is fast response to buy the sim card in the web site and easy to get the sim card in korea, and the 4G/LTE is stable when connect internet.

Very nice, it was convenient and reliable. I will use this internet SIM card again in next travel.

For travelers, the local data sim card is very important for using Maps, Hotel booking, Googling and keeping in touch with friends. Specially in South Korea where the public transportation is very modern, most of the local subways, buses, express train are updated on Google maps in latin letter, plus, the 4G/LTE in Korea is very fast even in rural area. I've been in a very nice and peaceful village without any tourist with just with my phone. Buy a Sim card in advance and enjoy your trip like a local.

Extremely convenient to redeem in the airport. Superb connection throughout my whole entire trip. Would love to recommend this to anyone who's gonna visit Korea!

The connection was good and trustworthy. it's especially good when you are on business trip.

Buying this SIM card is one of the best thing I ever did on our Seoul trip. It made navigating easier and I stayed connected with my family and friends wherever I go. You get unlimited data at super fast internet speed, I couldn't ask for more.

韓国に出張に来るたびにここsim cardを使用しています。

本当に満足しています

電話や文字とデータが全部できます。

It's much cheaper than buying it at the airport convenience store or ICN desk!

The goods are identical.

I'd like to recommend you buy in advance.

very easy to install and use. the pickup point was very easy to find and the staff very organized. the data speed is fast but not as expected though good enough for my need. would likely recommend this to friends and family.

First of all, you don't have to return krsim SIM CARD!

I'm satisfied.

The international calling is really cheap!!

4G data is really fast!!!

I'm not used to it yet, but I think it'll be fine.

Because so kind the answer to your Facebook message.

I don't regret buying at krsim.net :)

Because it is much cheaper than other sites and it is very easy to pick up the sim card.

And when I got a problem with Sim card, I was really impressed by your Facebook message right away..

I will recommend the krsim to my friends who are planning a trip to Korea.

Thank you for making my trip to Korea perfectly :):):)

SIM CARD is very convenient. I can access Internet everytime I need to search Map, place...with fast speed. It's so simple to install sim to my Phone.

외국에서 생활하다가 잠시 한국에 들어올일이 생겼었는데, 이 유심같은경우는 한국여권을 소지한 사람도 사용이 가능하다고 하셔서 불편한거 없이 잘 사용했습니다.

구입하기 전에 궁금한점은 facebook message를 이용해서 문의를 드렸었고 그 문의에 대해 친절하게 설명해주셔서 정말 감사드립니다.

It was fine:) Didn't have much problems with it. Staffs also helped when i had trouble installing the sim card.

Very fast, easy to get the wifi router at the airport. The internet speed is good, basically no problem.

In Korea, SIM card is really expensive. ;-(

But when compared to the airport and other sites, it's the cheapest.

Location was easy to find in airport. Make sure to look for the airport exterior door numbers don't get confused by the passenger exit door numbers. Very fast unlimited data, never lost signal at any point.

You can easily get your sim card at arrival hall. The speed is very good and you can access it almost everyway in Korea.

SIM CARDを使用するのに不便さがなかったし、次の韓国訪問時にもここsimカードを利用しそうです

It is very efficient and fast. Good deal! I am always connected and can easily use my social media.

excellent 4G connection as always! very convenient and user friendly. Will always purchase this SIM card whenever i go to Korea.

Great service from the counter staff, efficient and convenient. Fast connection and excellent network coverage.

It was good! There was no issue in showing the voucher and getting the sim card. The person at the counter had the pin and helped to put in the sim card too.

Great. Very cheaper than when you buy at the airport. Very easy when you find the place and take it.

The unlimited data was very useful, it served a helpful tool for foreigner to get to places without much hassle.

Sim card est très bon.

It was great and easy to activate

The data speed is good. I can do video chat without lagging while walking in the street. It is highly recommended.

Hello, krsim facebook message sevice very good .

The sim card is worth the price. The connection is very reliable & fast. Makes you connected all the time! The pick up booth for the sim card is very easy to locate. Might as well purchase here online than buying directly at the booth. It is way much cheaper here. Glad to have googled this site. Thumbs up!

The goods are too good, but the price is too expensive.

The SIM card is very helpful to me in my Korea trip. It's really unlimited and high-speed internet. Also the place to get the SIM card in the airport is quite easy to find.

Good luck with your customer response to Facebook.

The network speed is fast with good coverage.

The SIM card is easy to get at collection spot and easy to install and operation just you think can do it T

Excellent! The pick up location is very convenient. The service is good. The network is everywhere.

Convenient to use and easy installation at Gimhae airport. Data speed was awesome..

Good~

    Very good. The network is great whether it is easy to share with friends in Busan or Seoul.

 Very nice, it was convenient and reliable. I will use this internet SIM card again in next travel.

 The sim card signal very good. No need to carry another heavy Wifi stuff, much easy for travel, definitely will choose KT next time.

The internet speed and coverage are good. Also, easy to activate and no need to return after use!

 It is very convinient to use this sim card. Signal are good at every place i visit. This make my journey smoother. Recommand for couple

convenient pick up at airport!

The speed is great! It's made my trip more convenient because I frequently use it to connect a gps.

Transaction and collection was smooth. Worth the money as it's unlimited data, connection was excellent all the time.

Extremely convenient and hassle free!

It is a bit difficult to leave review..

But the SIM, price and quality is the best in all I have used.

Absolutely second to none.

Thank you.

I love it :). Kind response. Fast reply. User friendly interface website

Quick online help when the SIM card didn't activate due to a problem with my phone. I was worried I was in for a hassle, but things were handled in a professional and friendly manner. Best price I found at the airport, too!

Service is really awesome....I really enjoying 4G LTE service and also i feel that international call rates are pretty cheap!

I had a problem with my network connection so i messaged them through facebook and the response was really fast and helpful. They fixed my sim withing a day so i can use it normally now.

I was having trouble with the SIM I bought the other day. I messaged the guys on Facebook and they had it fixed up for me in no time. I was very happy with the service I received, thanks!

I could easily find it at Incheon International Airport  KT

The staff worked quickly and accurately.It's something I'd like to recommend to people around me.

Vert fast internet !! 😃 perfect! :):):):)

 The pick up is simple.  Fast and efficient.

Compared to other sites, I think it's the cheapest and best.

I recommend you to live here without worrying about it. Because it is a great experience to come to Korea and enjoy the Internet at this speed.