Key facts
- COVERAGE
- South Korea
- NETWORKS
- LG Uplus, SK
- PLAN TYPE
- Data only
- IP ADDRESS LOCATION
- Singapore, Asia
- DELIVERY
- QR code by email
How it works
- 1Choose a plan and pay.
- 2Scan the QR code we email you. You can install it before you fly.
- 3When you land in South Korea, turn on data roaming for the Spidot line.
Questions about the South Korea eSIM
Which networks does it use?
Do I get a local phone number?
Can I use it outside South Korea?
How do I install it?
Will my phone work with an eSIM?
Does Google Maps work in South Korea?
Can I use Kakao T without a Korean phone number?
Will my data work on the KTX and in the subway?
Is an eSIM better than renting pocket Wi-Fi?
Will WhatsApp and KakaoTalk keep working with my normal number?
Can I top up during my trip?
South Korea eSIM guide: mobile data for travellers
South Korea is one of the most connected places to travel, and daily life there assumes you have a phone with data. Visitors navigate Seoul's huge subway network between Myeongdong, Hongdae, Gangnam and the palaces of Jongno, ride the KTX high-speed train to Busan for Haeundae beach and Gamcheon Culture Village, explore the temples and tombs of Gyeongju, hike in Seoraksan National Park or fly to Jeju Island for its volcanic coast and Hallasan. Korean map, taxi and food apps make all of this much easier, and they all need a connection.
A Spidot eSIM gives you mobile data in South Korea from the moment you land. You install it at home, switch it on when you arrive and keep your normal SIM for calls and texts. This guide covers the options, how much data to plan for, arriving at Incheon, which apps visitors rely on, coverage beyond the cities, and travelling by train, bus and ferry.
eSIM, roaming or a local SIM in South Korea
Here is how the main options compare, so you can decide what suits your trip.
Roaming with your home SIM
Roaming works automatically, but South Korea is a long-haul destination for many visitors and roaming charges or daily passes can add up over a week or two. Check your operator's terms before you fly.
A Korean prepaid SIM or pocket Wi-Fi
Tourist SIMs and portable Wi-Fi routers can be bought or collected at Incheon and other airports, and prepaid SIMs are sold in some convenience stores and phone shops. You need your passport to register a SIM. A pocket router is one more device to charge and carry, and a physical SIM means removing your home SIM unless your phone has a second slot.
A Spidot eSIM
A Spidot eSIM adds a data line alongside your home SIM. You buy it online, receive the QR code by email straight after payment and install it before you fly, so there is no counter to queue at on arrival. Plans start from $5.90. Most plans are data-only without a Korean number. Some Korean services ask for a local phone number for verification; if you need one, look at our Data + calls plans and check whether they suit the service you have in mind.
How much data to plan for
Travellers in Korea tend to use their phones constantly: for maps, translation, food ordering, taxis and photos. These rough figures can help you estimate:
- Maps and navigation: a few megabytes per hour of walking or riding the subway.
- Translation apps: light for text; more if you use camera translation often.
- Taxi and delivery apps: light; each booking uses little data.
- Messaging and email: light, though photos and videos add up.
- Social media: moderate to heavy, especially with video from street food markets and K-culture spots.
- Video calls: typically several hundred megabytes per hour.
- Streaming video: heavy, often over a gigabyte per hour in high definition.
Typical choices
A few days in Seoul with hotel Wi-Fi can suit a moderate fixed data plan. A week or two moving between Seoul, Busan, Gyeongju and Jeju is more comfortable with a larger plan.
If you film and upload a lot, work remotely or share your connection, an unlimited plan saves you from counting megabytes, though speed may slow after heavy use. If you visit Korea often, a no-expiry plan keeps data for future trips. You can check how much data is left and add more data whenever you need it.
Before you travel
Installing an eSIM needs an internet connection, so do it at home on Wi-Fi. First check your phone supports eSIM and is carrier-unlocked.
Then follow the install guide for iPhone, Samsung or Pixel. Label the line "Travel", keep your home SIM for calls and texts, and set the Spidot line for mobile data.
- Install a day or two before departure, not at the gate.
- Keep the QR code email in a safe place.
- Download Korean map apps such as Naver Map or KakaoMap and set them to English where available.
- Install a taxi app such as Kakao T and a translation app such as Papago or Google Translate, and download Korean for offline use.
- Save hotel addresses in Korean script as well as English; drivers and map apps find them more easily.
The apps visitors rely on
Navigation in Korea works a little differently from many other countries. Google Maps is available but its walking and driving directions are limited, so most visitors use Korean map apps for routes.
- Naver Map and KakaoMap: detailed public transport, walking and driving directions, including subway exits and bus stops.
- Kakao T: the most widely used taxi app; many international users can register with a foreign number and card.
- KakaoTalk: the main messaging app in Korea; guesthouses, tour operators and shops often use it.
- Papago and Google Translate: text, voice and camera translation for menus and signs.
- Train apps: Korail's app and website sell KTX and other train tickets; seats on popular routes sell out at weekends and holidays.
Arriving at Incheon and other airports
Most international visitors arrive at Incheon International Airport, west of Seoul. Gimpo Airport, closer to the city, handles domestic and some regional flights. Gimhae Airport serves Busan, and Jeju has its own international airport. Others arrive by ferry from Japan to Busan.
When you land, choose the Spidot line for mobile data and turn on data roaming for it, as explained in our data roaming guide. Allow a minute or two for the phone to connect; if needed, switch flight mode on and off.
From Incheon to Seoul
The AREX airport railway runs to Seoul Station, with an express service and an all-stop train that connects with the subway. Airport limousine buses serve many districts and hotels, and taxis queue outside the terminals. With data, you can pick the bus that stops nearest your hotel, check the subway exit to use, and buy or top up a transport card.
Coverage in cities, mountains and islands
In Seoul, Busan, Incheon, Daegu, Daejeon, Gwangju and other cities, mobile data generally works very well, including in subway stations and on trains. Mobile data in South Korea is provided via LG Uplus and SK.
Coverage is extensive across the country, but a few places can still be weaker:
- Mountain trails: national parks such as Seoraksan, Jirisan and Bukhansan are well visited, but deep valleys and high ridges can have weaker spots.
- Small islands: islands off the south and west coasts, reached by ferry, may have patchier coverage away from harbours and villages.
- Jeju: towns and main roads are generally well covered; parts of Hallasan's trails and remote coastal stretches can be weaker.
- Near the DMZ: tours to the border area are popular from Seoul; follow your guide's instructions on phone use, as rules apply at some sites.
Data on trains, buses and ferries
Korea's rail network makes it easy to travel between cities. KTX and SRT high-speed trains link Seoul with Busan, Daegu, Daejeon, Gwangju and Gangneung, and slower trains reach smaller towns. Express and intercity buses cover almost everywhere else. Book trains in advance at weekends and during holidays such as Chuseok and Seollal, when the whole country travels.
Within cities, subway and bus fares are usually paid with a rechargeable transport card such as T-money, which you can buy and top up at convenience stores and stations.
Ferries and flights to Jeju and the islands
Jeju is most often reached by short domestic flights from Seoul Gimpo, Busan and other cities, and ferries also run from the south coast. Ferries serve many smaller islands. Signal usually holds near the coast but can drop on longer crossings, so save tickets offline.
Driving
Hiring a car is popular on Jeju, where buses are less frequent. On the mainland, trains and buses are usually easier. Visitors need an International Driving Permit or other accepted licence; check the requirements before you travel. Korean map apps give the best driving directions.
Hotspot for laptops and travel companions
Personal hotspot lets you share your eSIM data with a laptop, tablet or a travel companion's phone. It uses whichever line is set for mobile data, so make sure that is the Spidot line. This is useful for remote workers in cafés, families on Jeju road trips and anyone on a long KTX journey.
Pause cloud sync, automatic updates and photo backups on laptops before connecting, and choose a larger or unlimited plan if several devices will share your data.
Staying safe on public Wi-Fi
Free Wi-Fi is widely available in Korean cafés, subway stations, hotels and public spaces. It is convenient, but open networks are not always secure.
- Use your eSIM data for banking, payments and logins.
- Check the network name with staff before connecting.
- Turn off automatic connection to open networks.
- Keep your phone's software up to date before you travel.
Practical tips for South Korea
Some local knowledge that makes a data connection more useful:
- Payments: cards are accepted almost everywhere, including taxis and convenience stores. Some markets and street food stalls prefer cash in won.
- Convenience stores: they are everywhere and sell transport cards, top-ups, snacks and phone chargers.
- Addresses: Korean addresses can be confusing; searching in Korean script in a Korean map app is most reliable.
- Restaurants: many use tablet or QR ordering, and popular places run waiting lists by app or on-site tablet.
- Weather: summers are hot and humid with a rainy season, and winters are cold. Cold drains batteries faster, so keep your phone warm.
- Language: English is used on transport signs and in tourist areas, but less elsewhere. Camera translation helps with menus.
Combining South Korea with other countries
South Korea combines well with its neighbours. Popular routes include Seoul and Busan with Fukuoka, Osaka or Tokyo in Japan, including by ferry from Busan, and onward trips to Taiwan, Hong Kong, Vietnam, Thailand or the Philippines.
For trips through several countries, buy one eSIM per country, install them before you leave and switch the active data line when you arrive in each. For a stay in South Korea only, a South Korea plan keeps things simple.