Release Date
2015
OS
Android 5.0 (Lollipop), upgradable to 6.0 (Marshmallow), ZenUI
Processor
Qualcomm MSM8939 Snapdragon 615 (28 nm)
Battery
3000 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_Selfie_ZD551KL_5.0_OTA.zip
|
2 GB | |
|
Asus_ZenFone_Selfie_ZD551KL_UL_Z00T_51.15.40.1582_6.0.1_OTA.zip
|
2 GB |
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