Teltonika RUTX12 (0*****) in Japan
The Teltonika RUTX12 (0*****) rates good on 2 of 4 networks in Japan (NTT docomo and SoftBank). On KDDI (au) it is limited, missing a coverage band. On Rakuten Mobile it is limited, missing a coverage band.
Network by network
| Network | Verdict | Bands in use it supports | Core bands missing |
|---|---|---|---|
| NTT docomo | ✔ Good 75% | B1 B3 B28 | — |
| KDDI (au) | ◐ Limited 55% | B1 B3 B28 B41 | — |
| SoftBank | ✔ Good 100% | B1 B3 B8 | — |
| Rakuten Mobile | ◐ Limited 57% | B3 B28 | — |
Better-rated models here
- Quectel RM520N-GL 5G Sub-6 · global · Quectel · 4/4 Good
- Quectel RG255C-GL 5G RedCap · global · Quectel · 4/4 Good
- Quectel EG912U-GL Cat 1 bis · global · Quectel · 4/4 Good
About the Teltonika RUTX12 (0*****)
Industrial router · Cat 6 · Dual-modem industrial router · Europe, Middle East, Africa, Australia, APAC, Brazil, Malaysia · Teltonika1
- 4G B1 B3 B5 B7 B8 B20 B28 B38 B40 B41
The maker also lists B32 (1500 MHz), receive-only and only as a secondary carrier in aggregation, so it is not counted as a band that can carry a connection alone. Excludes Japan and China Mobile; no 2G.
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).2
All networks and bands in Japan → · The Teltonika RUTX12 (0*****) in 46 countries →
Back to the home: ask, enter a model or bands, or compare models
Sources
- A RUTX12 supported frequency bands by product code (Teltonika Networks Wiki) Teltonika Networks · 2026-10-03
- C Permanent roaming in IoT: rules by country (2026) Thingsdata · 2026
