Refinements in image processing for the 13MP front camera. Pre-requisites Before Updating
Press and hold Volume Down + Power Button simultaneously until the device vibrates, then release the power button but keep holding volume down.
If the OTA doesn't appear, you can manually flash the firmware:
If you encounter a boot loop after flashing new firmware, a solution is to disconnect the battery during the first boot attempt. After running a flash tool, disconnect the USB cable and remove the phone's back cover. As the phone begins to reboot to the boot logo, carefully disconnect the battery connector. Then, reconnect the battery and start the phone again in fastboot mode. asus zenfone selfie z00ud firmware 6.0 1
To install Android 6.0.1 Marshmallow, you must gather the correct software packages.
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
Upgrading to the Android 6.0.1 firmware transforms the phone's stability, declutters software bloating, and resolves bootloops. This comprehensive technical article provides the necessary architectural information, performance overviews, and step-by-step flashing procedures required to successfully install, maintain, or recover the . Refinements in image processing for the 13MP front camera
Before downloading or attempting to flash any ROM or package to your Go to product viewer dialog for this item.
Backup all personal data, contacts, messages, and media. Flashing firmware completely erases internal storage.
: One of the most celebrated aspects of the official ASUS Marshmallow update is that it strips away over a dozen preloaded applications. Apps like Asus Backup, Remote Link, PC Link, Mirror, and What's Next are permanently uninstalled. After running a flash tool, disconnect the USB
Connect your phone to the PC using a stable micro-USB cable. Launch a command prompt inside your ADB directory (Hold Shift + Right Click > Open Command Window Here ). Verify the physical connection by entering: adb devices Use code with caution.
Update Notification Not Appearing: Ensure the file name has not been changed. It must remain exactly as downloaded from Asus. Also, double-check that the file is in the root directory, not the "Download" folder.Stuck on Asus Logo: This is common after a major version jump. Boot into recovery and perform a "Wipe Cache Partition."Downgrade Issues: Moving from Marshmallow back to Lollipop is difficult and usually requires a factory reset and specific downgrade tools.
Android 6.0.1 Marshmallow fundamentally drops support for App2SD on this hardware tier. If you currently have apps moved to your external MicroSD card, you must move them back to the internal storage before updating. Failure to do so will result in permanent app data loss. Essential Pre-Upgrade Checklist
Tap the notification and follow the prompts to begin the installation. Ensure your battery is at least 60% charged before starting.
This comprehensive technical guide outlines the core specifications, preparation requirements, and step-by-step methods to download and manually flash the stock ROM. Firmware Overview & Technical Specifications