As of June 2026, the main prepaid eSIM/SIM options available for visitors to Korea are as follows.

5G Plans

LG U+ 5G :
– Provides both mobile data and local voice calls with a Korean phone number.
– The eSIM QR code is delivered instantly, allowing immediate data access.
– Offers fast and reliable 5G speeds.
– However, if you wish to use voice calls, you must complete an identity verification process at an airport roaming center.
– The price is generally higher than LTE plans.

Airalo 5G :
– Data-only service using the SKT or LG U+ network.
– The eSIM QR code is delivered instantly for immediate use.
– Offers fast and reliable 5G speeds.
– Does not provide voice calls or a Korean phone number.

LTE Plans

KT LTE :
– Requires a visit to an airport roaming center to collect the eSIM QR code.
– Provides both voice calls and a Korean phone number.
– Includes 3GB of high-speed data per day, followed by unlimited data at speeds of up to 5 Mbps.

SKT LTE :
– The eSIM QR code is delivered instantly for immediate use.
– Voice calls and a Korean phone number are available after completing online passport verification.
– No airport visit is required.
– Provides stable LTE service throughout Korea.

Conclusion

5G can provide faster speeds than LTE, especially in major cities and crowded areas.
However, most travelers mainly use services such as maps, messaging apps, social media, YouTube, Netflix, and video calls. For these activities, LTE is usually more than sufficient. In real-world travel situations, many visitors notice little difference between LTE and 5G performance.

In addition, 5G plans are generally more expensive than LTE plans.
If convenience and value for money are your priorities, an SKT LTE plan is often the best choice. On the other hand, if you want the fastest possible data speeds and do not mind paying a little extra, a 5G plan can also be a good option.