A Slashtel travel eSIM for South Korea connects to SK Telecom or LG Uplus, up to 5G. Your phone picks the strongest signal automatically.
South Korea has two main mobile networks, SK Telecom and LG Uplus, and your eSIM joins whichever partner network is strongest where you are, with 5G on offer from $2.59. Mobile subscriptions run at 173 per 100 people and 98 percent of the population uses the internet, per ITU data via the World Bank.
Last checked: October 2026
South Korea has two partner networks on the country plan, SK Telecom and LG Uplus. Network choice is automatic: the phone joins the strongest partner network where it is, and the eSIM cannot be locked to one carrier. You do not pick an operator in advance, so your data follows you as you move around the country.
This automatic switching is useful on a short trip. You land, the eSIM connects, and the phone selects a partner network on the spot. There is no list of carriers to choose from in the settings and no code to enter to change network.
The product is a data-only travel eSIM on a country plan. It has no local phone number. WhatsApp and app calls work over data, and your own SIM stays in for calls and bank texts. That means you keep your usual number for anything tied to it while the eSIM handles your data.
To get started:
South Korea runs 5G, and it is the newest generation available on the partner networks. The country is heavily connected: mobile subscriptions sit at 173 per 100 people and 98 percent of the population uses the internet, according to ITU data via the World Bank. Expect a mature network environment wherever travellers usually go.
Subscription numbers above 100 per 100 people tell you that many people hold more than one mobile line. It is a sign of a dense, well used mobile market rather than a promise about any single street or building. The internet usage figure points the same way: nearly everyone is online, so the networks serve daily life, not just visitors.
Your eSIM uses the partner networks that serve the country plan, and it joins whichever is strongest where you are. 5G is the generation to expect on those partners. Actual signal depends on where you are, what is between you and the mast, and how busy the network is at that moment.
This applies to the data side only. Your own SIM stays in the phone for calls and bank texts, and those run on your home operator, not on the South Korean networks.
Your phone must support eSIM and be carrier unlocked. Most recent iPhone, Samsung Galaxy and Google Pixel models do. If your phone is locked to your home operator, the travel eSIM will not work, so check that first. A phone that meets both conditions can use the country plan on arrival.
Carrier lock is the usual reason a phone fails abroad, and it is separate from eSIM support. A recent handset can still be locked, so confirm with your home operator that the phone is unlocked before you buy. eSIM support is listed in the phone settings under mobile data or SIM management.
The eSIM is data only. There is no local phone number, so nobody can call it and you cannot use it for verification texts sent to a South Korean number. WhatsApp and app calls work over data. Your own SIM stays in for calls and bank texts, which is why keeping it in place matters for anything tied to your home number.
Install the eSIM on Wi-Fi before the flight, not at the airport gate. The QR code arrives by email in minutes. Set the eSIM line up at home, leave it switched off until you land, and the plan days start when the eSIM first connects in South Korea.
The APN is set automatically on most phones. If data does not start after you land, turn on data roaming for the eSIM line. That step fixes most cases and costs nothing.
Prices are in US dollars, shown before payment, and nothing is added at checkout. Plan sizes include 1, 2, 3 and 5 GB, and lengths are 7, 15 and 30 days. Data can be added to the same eSIM online without a new QR code, so a short plan first and a top up later is a workable pattern.
Plan details were checked on 2026-10-31.
| Network | Best available |
|---|---|
| SK Telecom | 5G |
| LG Uplus | 5G |
| Data | Validity | Price | Per GB |
|---|---|---|---|
| 1GB | 7 days | $2.59 | $2.59 |
| 2GB | 15 days | $3.39 | $1.70 |
| 3GB | 15 days | $3.89 | $1.30 |
| 3GB | 30 days | $4.69 | $1.57 |
| 5GB | 30 days | $4.89 | $0.98 |
| 10GB | 30 days | $10.89 | $1.09 |
| 20GB | 30 days | $16.09 | $0.81 |
| 50GB | 30 days | $33.69 | $0.68 |
South Korea eSIM in your language: Deutsch · Français · Español · Italiano · Português · 日本語
Most unlocked 4G and 5G phones work in South Korea. Your own SIM works only if your home network has a roaming deal there, often at a daily charge. A travel eSIM adds local data on SK Telecom or LG Uplus without roaming fees, as long as your phone supports eSIM.
Travel eSIMs in South Korea connect to SK Telecom or LG Uplus. Network choice is automatic and depends on where you are.
A Slashtel eSIM for South Korea connects to SK Telecom or LG Uplus. Your phone joins the strongest available network automatically as you move around.
Yes, 5G is available on partner networks in South Korea where coverage reaches and your phone supports it. Elsewhere you connect on 4G.
No. The eSIM selects the network with the best signal automatically, which keeps you connected as you travel. It cannot be locked to one carrier.
Validity starts when your eSIM first connects to a network in South Korea, so you can buy and install it before you fly.
The country plan uses SK Telecom and LG Uplus as partner networks. Network choice is automatic, so the phone joins the strongest partner where it is. The eSIM cannot be locked to one carrier. You do not choose an operator yourself.
The eSIM is a data only travel eSIM on a country plan with no local phone number. It joins the strongest partner network automatically where you are. WhatsApp and app calls work over data, and your own SIM stays in for calls and bank texts.
The QR code arrives by email in minutes. Install the eSIM on Wi-Fi before your flight. The plan days start when the eSIM first connects in the country. If data does not start, turn on data roaming for the eSIM line.
Network list from our live supplier data. Networks are chosen automatically for the best signal and can vary by location and over time. All countries →