Dongle 400 in Japan
The Dongle 400 rates good on 1 of 4 networks in Japan (SoftBank). On NTT docomo it is limited, missing a coverage band. 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 | ◐ Limited 50% | B1 B3 | — |
| KDDI (au) | ◐ Limited 27% | B1 B3 | — |
| SoftBank | ✔ Good 100% | B1 B3 B8 | — |
| Rakuten Mobile | ◐ Limited 29% | B3 | — |
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
- F40 5G RedCap · Hyper Nexus dongle · 2/4 Good
About the Dongle 400
LTE Cat 4 · Hyper Nexus dongle1
- 4G B1 B2 B3 B4 B5 B7 B8 B12 B17 B20
Built for industrial AR glasses. USB Type-C, IP66.
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 Dongle 400 in 46 countries →
The Dongle 400 product page · Back to the home: ask, enter a model or bands, or compare models
Sources
- A Product specifications and certifications (manufacturer data) Hyper Nexus · 2026-09
- C Permanent roaming in IoT: rules by country (2026) Thingsdata · 2026
