KT (South Korea): 4G and 5G bands
KT (South Korea) runs 4G on B1, B3, B8; B8 is the coverage layer. 5G bands: n78. 5G SA: live (2021); RedCap: not launched; 3G: preparing to stop new sign-ups; 2G: switched off (2012).
Check your module in South Korea
Results cover the 3 networks here; the home page checks every country at once.
Bands in detail
| Band | Name | Duplex | Uplink MHz | Downlink MHz | Layer | Checked |
|---|---|---|---|---|---|---|
| B1 | 2100 IMT | FDD | 1920–1980 | 2110–2170 | capacity layer | cross-checked1 |
| B3 | 1800 DCS | FDD | 1710–1785 | 1805–1880 | capacity layer | cross-checked1 |
| B8 | 900 E-GSM | FDD | 880–915 | 925–960 | coverage layer | cross-checked1 |
| n78 | 3500 C-Band | TDD | 3300–3800 | 3300–3800 | capacity layer | cross-checked2 |
Frequencies are from the 3GPP specifications. “Single source” means only one community source lists the band; it is shown but not scored.
Network status
| 5G SA | Live (2021)2 |
|---|---|
| RedCap | Not launched |
| LTE-M | Commercial3 |
| NB-IoT | Commercial3 |
| 2G | Switched off (2012)4 |
| 3G | Preparing to stop new sign-ups5 |
| 28 GHz | Licence withdrawn (2022)2 |
Our dongles on this network
Supports B1, B3, B8 (coverage layer).
Supports B1, B3, B8 (coverage layer).
Supports B1, B3, B8 (coverage layer).
5G: 5G bands match, but no commercial RedCap yet (n78)
Sources
- C South Korea country guide (sources: frequencycheck.com and others) Hyper Nexus · 2026-09
- B 5G regulation and law in South Korea CMS Law · 2024
- B Mobile IoT network launches (Nov 2025) GSMA · 2025-11
- B S. Korea to end 2G network services by June Yonhap · 2021-01-17
- B SKT to gradually end 3G by end-2027; KT preparing to halt new sign-ups 머니투데이 (MT) · 2026-08-20
