The Android 6.0.1 Marshmallow firmware for the Asus ZenFone Selfie Z00UD represents a significant milestone for this classic device. It introduced better battery life, granular privacy controls, and a cleaner user interface. While Asus no longer actively supports the device with new updates, the official firmware is still available for download.
Confirm your device settings display model number ZD551KL or Z00UD to ensure you are using the correct software package. Required Download Links and Tools
You can find the firmware file directly on the ASUS Support Website. Installation Instructions asus zenfone selfie z00ud firmware 6.0 1
: Move the .zip file to the root directory of your phone's internal storage (not in any folder).
ASUS builds separate firmware files for different global markets (e.g., WW for Worldwide, CN for China, TW for Taiwan). You must download the SKU matching your current software (e.g., WW to WW); cross-flashing regional SKUs will cause installation failures. The Android 6
As the device is branded "Zenfone Selfie," the camera firmware was the focal point of the update.
If you want to tailor this guide to your exact situation, let me know: Is your phone currently or stuck in a bootloop ? Which regional SKU (WW, US, CN) does your device use? Do you have ADB tools installed on your computer already? Share public link Confirm your device settings display model number ZD551KL
is available via over-the-air (OTA) updates or manual installation from the ASUS Support site . This update removes several pre-installed "bloatware" apps to improve speed and storage space. 🛠️ Update Methods 1. Automatic Update (OTA) The easiest way to update is through the phone's settings: Go to > About > System update . Tap Check Update . If available, download and tap Install .
The full firmware package (over 1.2GB) includes all partitions. No need for intermediate OTAs.
Open the ADB folder on your PC, hold the Shift key, right-click an empty space inside the folder, and select (or Open PowerShell). Test the connection by typing: adb devices Use code with caution.