Firmware List:
| # | Model | Version | Region | OS | Size | |
|---|---|---|---|---|---|---|
| 1 | SM-J400M | J400MUBSECVF1 | CHT | Q(Android 10) | 2.6 GB | Download |
| 2 | SM-J400M | J400MUBUECUL5 | CHT | Q(Android 10) | 2.6 GB | Download |
| 3 | SM-J400M | J400MUBUCCUG1 | CHT | Q(Android 10) | 2.59 GB | Download |
| 4 | SM-J400M | J400MUBSCCUE3 | CHT | Q(Android 10) | 2.48 GB | Download |
| 5 | SM-J400M | J400MUBSACTI1 | CHT | Q(Android 10) | 2.48 GB | Download |
| 6 | SM-J400M | J400MUBU9CTGO | CHT | Q(Android 10) | 2.48 GB | Download |
| 7 | SM-J400M | J400MUBS8BTE2 | CHT | Pie(Android 9) | 2.34 GB | Download |
| 8 | SM-J400M | J400MUBU2ARI2 | CHT | Oreo(Android 8.0.0) | 2.15 GB | Download |
| 9 | SM-J400M | J400MUBS4BSG1 | CHT | Pie(Android 9) | 2.34 GB | Download |
| 10 | SM-J400M | J400MUBU4BSG3 | CHT | Pie(Android 9) | 2.34 GB | Download |
| 11 | SM-J400M | J400MUBS7BTB3 | CHT | Pie(Android 9) | 2.34 GB | Download |
| 12 | SM-J400M | J400MUBS4BSI2 | CHT | Pie(Android 9) | 2.34 GB | Download |
| 13 | SM-J400M | J400MUBU5BSL2 | CHT | Pie(Android 9) | 2.34 GB | Download |
| 14 | SM-J400M | J400MUBU3BSDD | CHT | Pie(Android 9) | 2.34 GB | Download |
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