South Korea eSIM
Data for South Korea on SKT and KT, from $5.89. It never expires, tethering is included, and you install Orbislo once rather than once per trip.
- Networks
- SKT and KT
- Real speed
- 104 Mbps median, 36 Mbps for the slowest tenth1,166 travellers, rolling 90 days
- 5G
- yes, standalone
- Throttle
- None on metered plans
- Tethering
- Allowed on every plan
Plans for South Korea
| Data | Validity | Price per GB | Price | Buy |
|---|---|---|---|---|
| 1 GB | Never expires | $5.89 | $5.89 | |
| 3 GB | Never expires | $2.96 | $8.89 | |
| 5 GBMost travellers | Never expires | $2.18 | $10.89 | |
| 10 GB | Never expires | $1.59 | $15.89 | |
| 20 GB | Never expires | $1.19 | $23.89 | |
| 50 GB | Never expires | $0.94 | $46.89 |
Every plan works the moment you land. Unused data returns to your wallet when the plan ends, and there is 100 MB of free rescue data on your account even at zero balance.
What 104 Mbps actually means in South Korea
Travellers on Orbislo in South Korea see a median download of 104 Mbps, measured across 1166 real sessions rather than a speed test we ran ourselves. That puts South Korea well above the Asia median of 43.9 Mbps, and 4th out of the 159 destinations we have measured.
The tenth percentile is 36 Mbps. That gap between the median and the floor is normal and it is where the frustration lives: the connection is quick most of the time and noticeably slow in the busiest few percent of moments, typically at transport hubs at peak hour.
At these speeds nothing on a phone is limited by the connection. Video calls are comfortable, a laptop can be tethered for a full working day, and large photo backups finish without planning around them.
Which networks you will be on
Orbislo carries traffic in South Korea on SKT and KT. Your phone is not tied to one of them. When the network you are attached to congests or drops, the profile moves you to the other, and it happens without a prompt and without you noticing anything except that the connection kept working.
This matters more than the headline speed. Almost every travel eSIM sold today resells a single upstream agreement per country, so when that one network has a bad hour you have a bad hour with it and your only option is to buy a second eSIM from somebody else. A profile with more than one network behind it can make a decision you never see.
5G in South Korea: yes, standalone. Worth knowing that 5G on a travel profile is normal rather than special, and that the tenth percentile above is the number that will decide how the trip feels, not the generation label in the status bar.
What data costs in South Korea
A 100 MB plan for South Korea starts at $0.30, which is $0.00 a gigabyte. That is the number to compare between providers, because a headline price attached to a different allowance tells you nothing.
The comparison most providers would rather you did not run is cost per gigabyte actually used. Independent surveys of travel data put the share of purchased data lost to expiry between 20 and 35 percent, because a plan that expires on day thirty deletes what you did not get through. Orbislo data has no expiry date, so the gigabyte you paid for is still there on the next trip. At the same headline price that is 25 to 40 percent more usable data, and in South Korea it means the effective cost is nearer $0.00 a gigabyte than $0.00.
Because nothing expires, the cheapest way to buy for South Korea is to buy slightly less than you think you need and top up if you run out. Topping up takes about ten seconds and does not involve installing anything. Buying too much is the expensive mistake everywhere else and merely a neutral one here.
Landing in South Korea
Install before you fly, on your home wifi. The profile downloads while you still have a connection you trust, then sits dormant until you land in South Korea and it attaches to SKT. Median time from tapping install to having service across all Orbislo orders is 41 seconds.
On landing there is one thing to check and it is the thing that goes wrong about sixty percent of the time people tell us they have no service: data roaming has to be switched on for the Orbislo line. It is off by default on both iOS and Android, and it has nothing to do with roaming charges here, because the plan is prepaid and there is no bill to run up. Turn it on for the Orbislo line and leave it off for your home line, and your home number keeps working for calls and bank codes without costing anything.
Coverage across South Korea
The measurements above are aggregated across South Korea, and a national median hides real variation. We publish separate figures for Seoul, Busan, Jeju and Incheon, because the difference between a capital and a coastal town is usually larger than the difference between two countries.
Outside the cities, coverage follows the same pattern it does everywhere: the main roads and the tourist corridors are well served, and it thins in the mountains and on the water. No travel eSIM changes that, because it is the same physical network the local population uses. What a multi network profile changes is which of the available towers you get to use.
Getting a local SIM in South Korea
Under article 32-4 of the Telecommunications Business Act a mobile operator has to confirm that the person signing is the person named, using the state run illegal contracting prevention system, and may refuse the contract to anyone who is not or who declines the check.
What is restricted in South Korea
- Lines per passport: A foreign passport can now be used to open only one mobile line, down from two. The government tightened the limit to stop phones registered in foreigners' names from being passed on for use in crime.
- Face verification: From 6 July 2026 face verification is being phased in whenever a mobile line is opened, with alternatives such as the government mobile ID app. For foreign customers, identity document checks are being built with the Justice Ministry, and the one line per person rule is set to tighten.
- Sharing a line: Nobody may use a mobile line to carry other people's communications or hand it over for their use, although letting someone use it occasionally, not repeatedly, is allowed. Breaking the rule carries up to one year in prison or a fine of up to 50 million won.
- Lines in another name: Opening a mobile line in another person's name to commit fraud, run gambling or arrange sex trafficking, or using a line opened in someone else's name in return for a loan, is punishable by up to three years in prison or a fine of up to 100 million won.
- Phones bought abroad: Radio equipment bought abroad and brought in by an individual for personal use, not for sale, is exempt from Korean conformity assessment at one unit per model, and clears customs with no exemption filing. A company importing even a single unit does not qualify.
Worth knowing about South Korea
- The enforcement decree names what a foreigner may present: an alien registration card, a resident registration card, a domestic residence report card or a passport. Whichever is handed over, the operator has to run it through the state system to confirm it is genuine.
- Since 1 October 2015 a real time identity check linked to immigration records lets a foreign visitor open a mobile line with nothing more than a passport, straight from the airport on arrival.
- Eight short numbers are designated emergency lines, among them 112 for crime, 119 for fire and rescue, 122 for accidents at sea and 111 for national security reports. Operators must connect these calls even from a phone whose outgoing calls are barred over an unpaid bill.
- From 1 October 2026 the suicide prevention line 109, free to call and staffed around the clock, joins the emergency list, so it connects even from a barred phone. Handset makers are also adding 109 to the lock screen emergency dialler.
- English and Chinese interpretation on the 112 police line has run 24 hours a day since March 2024, up from weekday daytime hours, with Japanese and Vietnamese planned next.
- The 119 line for fire, rescue and ambulance also takes reports by text message, photo, app and video call. The option was introduced in 2011 for people who find a voice call difficult, foreigners among them.
- Since February 2024, emergency alerts that sound an alarm tone carry the type of disaster and any earthquake magnitude in English alongside the Korean text, so a visitor who cannot read Korean can still tell what the warning is about.
- Dialling 1330 reaches the Korea Tourism Organization's travel line from anywhere in the country without an area code. Its staff give travel information, interpret, take complaints and work with 112, 119 and consulates to get help to visitors in distress.
- A network operator that takes payment in advance for prepaid service must hold guarantee insurance covering those advance charges, so prepaid customers are paid back if the service stops. Operators exempted for their financial strength are the exception.
How South Korea compares across Asia
- Speed rank
- 2 of 28 destinations we have measured in Asia
- Regional median
- 42.95 Mbps
- Consistency
- The slowest tenth still reaches 35 percent of the median
- Upstream networks
- 2, SKT, KT
- 5G
- Yes, standalone
- Next fastest nearby
- Singapore, 119 Mbps
- Next slowest nearby
- Hong Kong, 92 Mbps
- Cities with their own page
- 4: Seoul, Busan, Jeju, Incheon
- tenth percentile
- 36 Mbps
- Behind these figures
- 1166 travellers, rolling 90 days
