Firmware List:
| # | Model | Version | Region | OS | Size | |
|---|---|---|---|---|---|---|
| 1 | SM-J400M | J400MUBSDCUK3 | CTU | Q(Android 10) | 2.56 GB | Download |
| 2 | SM-J400M | J400MUBUCCUG1 | CTU | Q(Android 10) | 2.56 GB | Download |
| 3 | SM-J400M | J400MUBSCCUE3 | CTU | Q(Android 10) | 2.53 GB | Download |
| 4 | SM-J400M | J400MUBSBCUC1 | CTU | Q(Android 10) | 2.53 GB | Download |
| 5 | SM-J400M | J400MUBS9BTF3 | CTU | Pie(Android 9) | 2.4 GB | Download |
| 6 | SM-J400M | J400MUBS2ARI1 | CTU | Oreo(Android 8.0.0) | 2.21 GB | Download |
| 7 | SM-J400M | J400MUBU2ARL4 | CTU | Oreo(Android 8.0.0) | 2.26 GB | Download |
| 8 | SM-J400M | J400MUBS7BTB3 | CTU | Pie(Android 9) | 2.4 GB | Download |
| 9 | SM-J400M | J400MUBS8BTE2 | CTU | Pie(Android 9) | 2.4 GB | Download |
| 10 | SM-J400M | J400MUBS4BSI2 | CTU | Pie(Android 9) | 2.4 GB | Download |
| 11 | SM-J400M | J400MUBS6BTA1 | CTU | Pie(Android 9) | 2.4 GB | Download |
| 12 | SM-J400M | J400MUBS3BSE3 | CTU | Pie(Android 9) | 2.4 GB | Download |
| 13 | SM-J400M | J400MUBS4BSI1 | CTU | Pie(Android 9) | 2.4 GB | Download |
| 14 | SM-J400M | J400MUBU3BSDD | CTU | Pie(Android 9) | 2.4 GB | Download |
| 15 | SM-J400M | J400MUBU3BSF2 | CTU | Pie(Android 9) | 2.4 GB | Download |
| 16 | SM-J400M | J400MUBU5BSL2 | CTU | Pie(Android 9) | 2.4 GB | Download |
| 17 | SM-J400M | J400MUBU4BSG3 | CTU | Pie(Android 9) | 2.4 GB | Download |
| 18 | SM-J400M | J400MUBS4BSG2 | CTU | Pie(Android 9) | 2.4 GB | Download |
| 19 | SM-J400M | J400MUBS5BSK1 | CTU | Pie(Android 9) | 2.4 GB | Download |
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