Release Date
2017
OS
Android 7.1.1 (Nougat), upgradable to Android 8 (Oreo), ZenUI 4
Processor
Qualcomm MSM8998 Snapdragon 835 (10 nm)
Battery
3600 mAh
⚠️ Important Notice
Flashing firmware can be risky. Follow instructions carefully and backup your data before proceeding. We are not responsible for any damage to your device.
Available Firmware Files
| File Name | Size | Download |
|---|---|---|
|
Asus_ZenFone_4_Pro_ZS551KL_15.0410.1803.51_11002221_21.0.0_M0_180328_Phone-user.raw-1316801602199284.zip
|
How to Flash Stock ROM
- Download the correct ROM file for your device
- Install the required flash tool
- Enable USB debugging on your device
- Boot your device into download mode
- Connect your device to computer via USB
- Load the ROM file in the flash tool and start flashing
- Wait for the process to complete
- Reboot your device
Precautions
- Backup all important data before flashing
- Ensure battery is at least 50% charged
- Use original USB cable for stable connection
- Don't disconnect during flashing process
- Download ROM only for your specific model
- Follow manufacturer's instructions carefully