South Korea eSIM
data from $2.59.

If you are searching for an eSIM for South Korea, buy a data only plan that connects to SK Telecom and LG Uplus. Slashtel plans start from $2.59 and run from 1GB to 50GB over 7, 15 or 30 days. There is no local number, so you keep your home SIM for calls and bank codes, and the network is chosen automatically.

Choosing an eSIM for South Korea

What matters is coverage on the main networks, a data size that matches your trip, a validity window that covers your dates, hotspot support and installing the eSIM before you fly. You do not need the best eSIM for South Korea in the abstract, you need one that fits how you travel.

Coverage comes first. A plan that works on both SK Telecom and LG Uplus gives you two major networks to fall back on as you move between cities and islands. Check that the plan lists both, because that is the practical test of a travel eSIM for a multi city trip.

Data size is the second decision. A short break with maps and messaging needs far less than a working month with hotspot use. Look at your normal daily habits, then add a margin for travel days when you use maps and translation more than usual.

Validity is the third. The clock starts when the plan activates, so a 7 day plan suits a one week trip and a 30 day plan suits a longer stay. Buying a plan that expires mid trip leaves you topping up or buying again.

Hotspot support matters if you carry a laptop or a second device. Data only plans can share a connection, but the shared use counts against the same allowance, so size up if you plan to tether.

Finally, install before you fly. Adding the eSIM at home on reliable wifi lets you test that it appears in your settings, so arrival at Incheon or Gimhae is not the moment you discover a problem.

Plans and prices for South Korea

Plans come in 1GB, 2GB, 3GB, 5GB, 10GB, 20GB and 50GB sizes over 7, 15 or 30 days, with prices starting from $2.59. The table below shows the plan sizes with their price tokens, which display the current live price when the page loads.

Small plans suit light use and short trips. Larger plans suit longer stays, hotspot use and heavy map or photo upload days. If you are unsure, choose the next size up rather than risk running out in the middle of a Jeju road trip.

Networks and coverage in South Korea

Slashtel South Korea plans connect to SK Telecom and LG Uplus, with 5G where it is available, and the network is chosen automatically. You do not pick a network manually, the eSIM attaches to a supported network as you move.

SK Telecom and LG Uplus are the two networks named for this destination. Between them they cover the main travel routes: Seoul and the surrounding capital region, the KTX corridor down to Busan, and the flights and ferries to Jeju. Coverage in tunnels, deep basements and some mountain areas can differ, which is one reason having two networks listed is useful.

Your phone shows the network name in settings once the eSIM is active. If you see no service, check that the eSIM line is switched on and that data roaming is enabled for that line, since travel eSIMs use roaming agreements.

How much data you need

Match the size to the trip: light city breaks need little, while longer multi city trips with hotspot use need more. The plan sizes below are the ones listed for this destination.

• One week: 1GB over 7 days for maps, messaging and light browsing.
• Two weeks: 2GB over 15 days for a Seoul and Busan trip with regular map use.
• One month: 3GB over 30 days for a longer stay with everyday messaging.
• Heavier use: 5GB, 10GB, 20GB or 50GB if you upload photos, stream or share a hotspot.

Data only means no calls or SMS over the mobile network, so your messaging apps use data. If you plan to send photos home daily or work from a laptop, move up a size.

Install it before you fly

Install the eSIM at home on wifi and label it clearly, then switch it on when you land. Installation before departure avoids depending on airport wifi and gives you time to fix any issue.

On iPhone and Android the steps are similar: open your settings, add a mobile plan, scan the QR code or enter the details manually, then label the line. Our guide at /guides/install-esim-iphone-android walks through the process. If you are not sure your handset supports eSIM, check /guides/is-my-phone-esim-compatible first.

Keep the eSIM line off until you need it, or set it as the data line only when you arrive. Leave your home SIM active for calls and bank codes, and set the eSIM as the mobile data line so apps use the travel allowance.

Calls, texts and your home number

The South Korea eSIM is data only: there is no local number, no calls and no SMS. WhatsApp and FaceTime calls work over data, so you can still talk to people at home and to anyone you meet.

Keep your home SIM in the phone for calls and bank codes. Many banks send one time codes by SMS to your usual number, and those still arrive on your home line if your operator allows roaming for texts. Set the eSIM as the data line and your home SIM as the line for calls and messages, and check your home operator's roaming terms before you travel.

Questions travellers ask about South Korea

The common questions cover data only use, messaging apps, hotspot, activation timing, topping up and phone compatibility. Short answers follow, and the FAQ section below covers each in more detail.

If you need more data later, buy another plan from the same destination rather than expecting the current one to extend. If you are unsure when your plan starts, check the activation details before you install.