SIMCom SIM7080G in Japan
The SIMCom SIM7080G rates good on 3 of 4 networks in Japan (NTT docomo, KDDI (au) and SoftBank). On Rakuten Mobile it is unconfirmed, missing a coverage band.
Network by network
| Network | Verdict | Bands in use it supports | Core bands missing |
|---|---|---|---|
| NTT docomo | ✔ Good 75% | B1 B3 B19 B28 | — |
| KDDI (au) | ✔ Good 73% | B1 B3 B18 B26 B28 | — |
| SoftBank | ✔ Good 100% | B1 B3 B8 | — |
| Rakuten Mobile | ? To be confirmed 100% | B3 B28 B18 B26 | — |
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 SIMCom SIM7080G
LTE-M / NB-IoT · global · SIMCom12
- 4G B1 B2 B3 B4 B5 B8 B12 B13 B14 B18 B19 B20 B25 B26 B27 B28 B66 B71 B85
- LTE-M and NB-IoT assessed together
LTE-M and NB-IoT are assessed together: B14 and B27 are LTE-M only, B71 is NB-IoT only, and the SIM7080G-M supports LTE-M only.
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 SIMCom SIM7080G in 46 countries →
Back to the home: ask, enter a model or bands, or compare models
Sources
- A SIM7080G product page: Cat-M and NB-IoT bands SIMCom · 2026-10-02
- B SIMCom SIM7080G product specifications (bands) Macnica · 2026-10-02
- C Permanent roaming in IoT: rules by country (2026) Thingsdata · 2026
