Device Name: Asus Zenfone SelfieModel Number: ZD551KL (Z00UD)Android Version: 6.0.1 MarshmallowBuild Number: WW-21.40.0.2214 (or later)Region: WW (Worldwide) Key Features of Marshmallow 6.0.1
: Ensure your device is currently running the latest Android Lollipop version before jumping to Marshmallow. Download : Download the .zip file (do not unzip it).
Tap the notification, confirm the selected firmware zip package, and tap . The device will automatically reboot into recovery, flash the firmware, and restart into Android 6.0.1.
The Ultimate Guide to ASUS ZenFone Selfie (Z00UD) Android 6.0.1 Firmware asus zenfone selfie z00ud firmware 6.0 1
ASUS removed a massive chunk of duplicate pre-loaded software and bloatware apps, liberating valuable internal storage space.
If you encounter issues like WiFi not turning on after updating to Marshmallow, the first step is to perform a factory reset. Back up your data, then go to Settings > Backup & Reset > Factory Data Reset . This can clear up conflicts caused by leftover data from the previous Android version.
ASUS removed over 20 pre-loaded apps, including ASUS Backup, Mirror, and Remote Link, to free up storage. The device will automatically reboot into recovery, flash
Let’s be realistic: The Z00UD is a legacy device. Here’s an honest take on using today:
Rare, but try: Go to Settings > Security > Fingerprint > remove all fingerprints > reboot > re-add.
The official firmware for the Z00UD typically followed the versioning convention . Back up your data, then go to Settings
WW_V21.40.0.1854 is one of the verified official Marshmallow OTA builds. Key Changes: App Removal:
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Whether your phone is currently stuck in a bootloop, running sluggishly, or you simply want to manually perform a clean upgrade, installing the correct official flash file is essential. This comprehensive, step-by-step article details how to safely download and flash the using official and reliable methods. 🛠️ Prerequisites Before Flashing
Ensure all your photos, contacts, and important documents are backed up to Google Drive
: Move the .zip file to the root directory of your phone's internal storage (not in any folder).