Quectel EC25-AU in Japan
The Quectel EC25-AU 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 45% | B1 B3 B28 | — |
| 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 Quectel EC25-AU
Cat 4 · Australia, New Zealand, Latin America · Quectel12
- 4G B1 B2 B3 B4 B5 B7 B8 B28 B40
The maker notes that B2 on the EC25-AU has no receive diversity, so performance drops in weak signal. No B20, B12 or B13: not for Europe or the United States.
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 Quectel EC25-AU in 46 countries →
Back to the home: ask, enter a model or bands, or compare models
Sources
- A EC25 variants and their bands, as published by Deutsche Telekom IoT Quectel · 2021
- A EC25 Series specification (bands of every variant), as published by Mouser Quectel · 2020
- C Permanent roaming in IoT: rules by country (2026) Thingsdata · 2026
