13 plans from 1GB to 50GB. Buy now, scan the QR, and your data works the moment you land.
It runs on South Korea's national mobile networks, so the same plan works right across the country, including Seoul, Busan and Jeju. There is nothing extra to buy for a city or island.
Slashtel South Korea eSIMs start at $2.59 for 1GB over 7 days, across 13 plans. The lowest price per GB is $0.67 on the 50GB plan. A one-week trip costs from $2.59 (1GB). It connects to SKTelecom and LG Uplus on up to 5G. Prices checked 9 October 2026.
Last checked: September 2026
You step off the plane at Seoul Incheon (ICN), tired but ready. Before you reach the baggage carousel, you want to check your messages, look up the train times, and let family know you have landed. With a Slashtel eSIM, you can do all that the moment you switch it on. No queuing at a SIM kiosk, no hunting for a shop in the arrivals hall.
Slashtel sells data only eSIMs for South Korea. You buy online before you travel, and your QR code arrives by email within a minute. Install it at home on Wi-Fi, and it connects when you land. Prices start from $2.59, with no contract and no local address needed. It is data only, so there is no local number, calls or SMS, but you can use WhatsApp calls over data. Hotspot is allowed, and top-ups are done online on the same eSIM. Days start counting only when it first connects at your destination.
UK travellers often visit South Korea for city breaks and K culture trips. You might spend a few days in Seoul exploring palaces, markets and themed cafes, then take the fast train to Busan for beaches and seafood. Jeju is a short flight away for volcanic landscapes and hiking. With an eSIM, you can navigate, translate, and share your trip without worrying about roaming charges.
Indian travellers come for studies, holidays and business. If you are a student, you will need data for maps, messaging and research. Holidaymakers want to explore Seoul, Busan and Jeju without losing touch. Business travellers need reliable connectivity for email and calls over data. An eSIM keeps you online from the moment you land, and you can keep your Indian SIM active for bank OTPs and calls.
| Data | Duration | What it covers |
|---|---|---|
| 1GB | 3-5 days | Maps, WhatsApp text, light email. No video. |
| 3GB | 1 week | Maps, WhatsApp calls, occasional social media. |
| 5GB | 2 weeks | Maps, WhatsApp video, some music streaming. |
| 10GB | 1 month | Daily use including video and video calls. |
For a short trip, 1GB is enough if you mainly use maps and messaging. If you plan to share photos, make video calls, or stream music, choose 3GB or more. Remember that hotspot uses data faster, so if you need to connect a laptop, go for a larger plan.
Local map apps such as Naver Map and KakaoMap give better walking and transit directions than Google Maps. In South Korea, Google Maps is limited for walking and transit, so download Naver Map or KakaoMap before you go. These apps provide accurate subway routes, bus times, and walking directions. They are in English and easy to use.
Transit cards like T-money are sold at airport convenience stores and work on buses and the subway. Pick up a T-money card at Incheon Airport or any convenience store. You can load it with cash and tap on and off buses and subways in Seoul, Busan, and Jeju. It saves you buying single tickets and works across different cities.
Install your eSIM before you fly, while you have Wi Fi at home. Follow our installation guide for step by step instructions. Your home SIM stays in your phone for calls and OTPs, so you do not miss important messages. If you are an Indian traveller, see our guide on keeping your Indian SIM active abroad.
Ready to travel? Browse South Korea data plans and choose the one that fits your trip. Prices start from $2.59. The QR code arrives by email within a minute, and you can install it right away. No contract, no local address, just data when you need it.
Last checked: September 2026. Prices and plans are verified on the Slashtel site at the time of writing.
Yes. Your phone must be unlocked and support eSIM. Most recent iPhones and many Android phones do. Check your phone settings for eSIM support before you buy.
Yes. Keep your home SIM in your phone for calls and SMS, including bank OTPs. Use the Slashtel eSIM for data. You can turn off data roaming on your home SIM to avoid charges.
For a 1 week trip, 3GB is usually enough for maps, WhatsApp calls and occasional social media. For 2 weeks, 5GB gives you room for WhatsApp video and some music streaming. If you plan to use your phone as a hotspot or stream a lot, consider 10GB.
Yes. Install it before you fly, while you have Wi-Fi at home. The QR code arrives by email within a minute of purchase. The days start counting only when it first connects at your destination.
You will get coverage in all three areas on a major local network. However, coverage can vary in remote areas, basements, and some indoor spaces. For the best experience, use local map apps like Naver Map or KakaoMap for accurate directions.
Yes. Hotspot is allowed, so you can share your data with a laptop or other devices. Just remember that using hotspot will use more data, so keep an eye on your usage.
For most trips a 5GB to 10GB data eSIM valid for 30 days is the right size: Slashtel's 5GB plan for South Korea is $6.39 on SKTelecom and LG Uplus. Install it before you fly, keep your home SIM on for calls and bank texts, and top up the same eSIM if you run low.
If your phone supports eSIM, an eSIM is simpler than a local SIM card: nothing to collect at the airport, no passport registration, and your home SIM stays in the phone for calls and OTP texts. A physical SIM only makes sense for long stays where you need a local phone number.
From $2.59 for 1GB valid 7 days, as of 9 October 2026. Longer trips: two weeks from $4.29 (3GB), one month from $4.49 (3GB).
$0.67 per GB on the 50GB plan (30 days, $33.69). Bigger plans usually cost less per GB, so buy the size you expect to use.
SKTelecom and LG Uplus, with speeds up to 5G where available. The eSIM picks the strongest network automatically.
No. Slashtel eSIMs are data only, with no local number, calls or SMS. WhatsApp and other internet calls work, and your home SIM can stay on for calls and OTP texts.
Validity starts when the eSIM first connects to a network in South Korea, not when you buy it, so you can buy and install it before you travel.
After payment Slashtel emails a QR code within a minute. Scan it in your phone settings while on Wi-Fi at home, then switch on data roaming for the eSIM when you land.
Your phone must support eSIM and be carrier-unlocked. Dial *#06#: if an EID appears, the phone supports eSIM.
Yes. Hotspot and tethering are allowed on Slashtel eSIMs.
Pick a plan, pay by card. QR arrives by email within a minute.
Scan the QR on Wi-Fi at home. Takes two minutes. Keep your main SIM in.
Enable data roaming on the Slashtel line. Done, no shops, no queues.