Firmware List:
| # | Model | Version | Region | OS | Size | |
|---|---|---|---|---|---|---|
| 1 | SM-J400M | J400MUBSDCUK3 | PSP | Q(Android 10) | 2.52 GB | Download |
| 2 | SM-J400M | J400MUBUCCUG1 | PSP | Q(Android 10) | 2.51 GB | Download |
| 3 | SM-J400M | J400MUBSCCUE3 | PSP | Q(Android 10) | 2.51 GB | Download |
| 4 | SM-J400M | J400MUBSBCUC1 | PSP | Q(Android 10) | 2.51 GB | Download |
| 5 | SM-J400M | J400MUBS8BTE2 | PSP | Pie(Android 9) | 2.42 GB | Download |
| 6 | SM-J400M | J400MUBS4BSI3 | PSP | Pie(Android 9) | 2.42 GB | Download |
| 7 | SM-J400M | J400MUBS7BTB3 | PSP | Pie(Android 9) | 2.42 GB | Download |
| 8 | SM-J400M | J400MUBU5BSL2 | PSP | Pie(Android 9) | 2.42 GB | Download |
| 9 | SM-J400M | J400MUBU3BSDD | PSP | Pie(Android 9) | 2.42 GB | Download |
| 10 | SM-J400M | J400MUBS4BSG1 | PSP | Pie(Android 9) | 2.42 GB | Download |
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