South Korea has some of the fastest mobile internet in the world. An eSIM lets you tap into blazing 5G speeds the moment you land at Incheon airport.
Updated March 2026
Korea 3GB — 3 GB
Airalo offers the best value for South Korea on the KT or SK Telecom networks. With Korea's incredible network infrastructure, you will enjoy very fast speeds even on basic plans.
Get this dealSide-by-side comparison of the best eSIM deals for South Korea. Sorted by price.
| Provider | Plan | Data | Validity | Price | Price/GB | Network | |
|---|---|---|---|---|---|---|---|
| Best Deal Airalo | Korea 3GB | 3 GB | 30 days | £5.00 | £1.67 | KT / SK Telecom | View |
| Airalo | Korea 10GB | 10 GB | 30 days | £13.00 | £1.30 | KT / SK Telecom | View |
| Holafly | Korea Unlimited | Unlimited | 7 days | £19.00 | N/A | KT | View |
| Saily | Korea 5GB | 5 GB | 14 days | £7.49 | £1.50 | SK Telecom | View |
| Ubigi | Korea 3GB | 3 GB | 30 days | £9.00 | £3.00 | KT | View |
| MobiMatter | Korea 5GB | 5 GB | 14 days | £8.00 | £1.60 | KT | View |
Common questions about using an eSIM in South Korea.
Airalo offers the cheapest South Korea eSIM at £5.00 for 3 GB with 30-day validity on the KT or SK Telecom networks.
South Korea consistently ranks as having the fastest mobile internet in the world. You can expect 4G speeds of 50-100 Mbps and 5G speeds exceeding 500 Mbps in Seoul and other major cities.
Yes, the Seoul Metro has excellent mobile coverage underground. You can use your eSIM data connection throughout the subway system for maps and messaging.
KakaoMap is significantly more accurate for South Korea than Google Maps, especially for public transport directions. Both work with eSIM data, but we recommend downloading KakaoMap.
For a week in Seoul with regular use of maps, KakaoTalk messaging, and social media, 3-5 GB is sufficient. Korea has ubiquitous free Wi-Fi that supplements your data.