Download ASUS Zenfone 4 (ZE554KL) official stock firmware from the link here, and follow the provided flashing instructions to learn how to flash the stock ROM.
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Download ZenFone 4 (ZE554KL) (ASUS_Z01KD*) firmware
| Build number | Link | Size | Desc. | Release Date |
|---|---|---|---|---|
| WW-16.0620.1912.23 | Download | 1.75 GB | Upgrade to Android 9.0 (Pie) | 2020/02/25 |
| WW-15.0610.1905.28 (ZE554K_P_downgrade_to_O) | Download | 2.27 GB | Downgrade from Android P to Android 8 Oreo | 2020/02/25 |
| WW-15.0610.1909.39 | Download | 2.27 GB | Android 8.0 (Oreo) | 2019/09/27 |
| JP_15.0405.1806.116 | Download | 2.19 GB | Android 8.0 (Oreo) | 2018/07/19 |
| TIM_15.0405.1806.116 | Download | 2.19 GB | Android 8.0 (Oreo) | 2018/07/19 |
| OP_SG_15.0405.1806.116 | Download | 2.19 GB | Android 8.0 (Oreo) | 2018/07/19 |
| WIND_15.0405.1806.116 | Download | 2.19 GB | Android 8.0 (Oreo) | 2018/07/17 |
| VF_IT_15.0405.1806.116 | Download | 2.19 GB | Android 8.0 (Oreo) | 2018/07/17 |
How to flash
- Extract the .RAW firmware from the downloaded zip package to device’ microSD card, in the root directory.
- Disconnect any USB cables connected.
- Reboot the device to recovery by pressing BOTH Power_On + Volume_Up (Hold).
- The logo “No USB connected” will show up,
- Press BOTH Volume_Down + Volume_Up.
- Select the option “SD DOWNLOAD”.
- Wait for flashing process to begin and complete
- Reboot.