USR IOT USR-DR154-E in South Korea
The USR IOT USR-DR154-E rates good on all 3 networks in South Korea (SK Telecom, KT and LG U+). 3G switch-off: WCDMA licences (KT, SKT) by December 2026.
Network by network
| Network | Verdict | Bands in use it supports | Core bands missing |
|---|---|---|---|
| SK Telecom | ✔ Good 100% | B1 B3 B7 B5 | — |
| KT | ✔ Good 100% | B1 B3 B8 | — |
| LG U+ | ✔ Good 100% | B1 B7 B5 | — |
Better-rated models here
In South Korea it is already among the best-rated models.
About the USR IOT USR-DR154-E
DTU · Cat 1 · Lipstick-size RS485 DTU · international version · USR IOT12
- 4G B1 B3 B5 B7 B8 B20 B28
LTE Cat 1, tiny and DIN-rail mountable; the Chinese USR-DR154 has only B1, B3, B5 and B8, so pick the -E version for deployments abroad.
Network access: long-term roaming
Many globally deployed IoT devices use multi-network roaming SIMs that can attach to several networks in a country, but some countries restrict long-term roaming by foreign SIMs. A local SIM roaming domestically is not affected.
◐ Allowed under conditions: Allowed under certain conditions (one source so far).3
All networks and bands in South Korea → · The USR IOT USR-DR154-E in 46 countries →
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Sources
- A USR-DR154 series datasheet: bands of the -E and Chinese versions USR IOT (PUSR) · 2025
- C USR-DR154-E: 4G LTE Cat 1 modem with European bands SOS electronic · 2026-10-03
- C Permanent roaming in IoT: rules by country (2026) Thingsdata · 2026
