Huawei E3372h-320 in Japan
The Huawei E3372h-320 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 B28 | — |
| KDDI (au) | ◐ Limited 36% | B1 B3 B28 | — |
| SoftBank | ✔ Good 100% | B1 B3 B8 | — |
| Rakuten Mobile | ◐ Limited 43% | 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 Huawei E3372h-320
Dongle · Cat 4 · USB dongle · Europe, Asia-Pacific and most of the world · Huawei12
- 4G B1 B3 B7 B8 B20 B28
Per its GCF certification record: LTE B1, B3, B7, B8, B20 and B28, no TDD. Some listings quote the bands of the E3372h-153 (without B28), so check the suffix when buying.
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 Japan → · The Huawei E3372h-320 in 46 countries →
Back to the home: ask, enter a model or bands, or compare models
Sources
- A GCF certification record 8575: Huawei E3372h-320 (bands certified on 2020-01-08) Global Certification Forum · 2020-01-08
- C Huawei E3372h-320 listing (bands) SincereOne · 2026-10-03
- C Permanent roaming in IoT: rules by country (2026) Thingsdata · 2026
