u-blox SARA-R510M8S in South Korea
The u-blox SARA-R510M8S rates good on 2 of 3 networks in South Korea (KT and LG U+). On SK Telecom it is unconfirmed, missing a coverage band. 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 | ? To be confirmed 80% | B1 B3 B5 | — |
| KT | ✔ Good 100% | B1 B3 B8 | — |
| LG U+ | ✔ Good 75% | B1 B5 | — |
Better-rated models here
- Quectel RM520N-GL 5G Sub-6 · global · Quectel · 3/3 Good
- Quectel EG912U-GL Cat 1 bis · global · Quectel · 3/3 Good
- Quectel EG25-G Cat 4 · global · Quectel · 3/3 Good
About the u-blox SARA-R510M8S
LTE-M / NB-IoT · global · u-blox12
- 4G B1 B2 B3 B4 B5 B8 B12 B13 B18 B19 B20 B25 B26 B28 B66 B71 B85
- LTE-M and NB-IoT assessed together
LTE-M and NB-IoT are assessed together: B25 is LTE-M only, B66, B71 and B85 are NB-IoT only, and the “00” versions do not support NB-IoT.
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 u-blox SARA-R510M8S in 46 countries →
Back to the home: ask, enter a model or bands, or compare models
Sources
- A SARA-R5 series data sheet UBX-19016638: LTE bands by technology (as mirrored by alldatasheet) u-blox · 2026-10-02
- B u-blox SARA-R510S / SARA-R510M8S product specifications (LTE bands) Macnica · 2026-10-02
- C Permanent roaming in IoT: rules by country (2026) Thingsdata · 2026
