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How to Manually Update Zenfone 2 ZE551ML & ZE550ML to Marshmallow Read What's New in Marshmallow Update for Zenfone 2 Download Link for ZE550ML (Z008) download link fo ze551ml(Z00A) How to Download? Just visit the link that matches your device model. Choose  Android  as the OS. Expand  firmware  section. Choose the latest version in the 4.xx series. Example –  4.21.40.178 Method 1 – Update via ADB (PC Needed) We strongly recommend following this method to update your phone if you have access to a PC. There are lesser chances of the phone getting bricked during the update. Download & Install ADB & Drivers to your PC. Turn off your phone. Boot to fastboot mode by  pressing and holding  the  Power & Volume Up  keys. Use volume keys to choose Recovery Mode. Press power key to select. Select  Apply update from ADB  in Recovery Mode and connect your phone to the PC using USB cable. On your PC, navigate to the folder where you ha

How to Downgrade Asus Zenfone 2 from Marshmallow to Lollipop (ZE551ML & ZE550ML) Asus Zenfone 2  (ZE551ML & ZE550ML) ,  If you too are not happy with the  Marshmallow  update and wish to downgrade to the old  Lollipop , this post is for you. Read on to find the step-by-step guide on downgrading Zenfone 2 to Lollipop. While the process is pretty straightforward, please do note that downgrading will delete all user data. So, backing up all important data is your responsibility. Downgrading Asus Zenfone 2 to Lollipop (ZE551ML & ZE550ML) This tutorial is written only for the  ZE551ML & ZE550ML  variants of the Zenfone 2. The process will be mostly the same for other Zenfone 2 variants, but please stay cautious and make sure you do not flash the wrong firmware on your device. Flashing the wrong firmware can damage your smartphone. Please backup your photos, messages, WhatsApp & other data as everything will be erased when you downgrade. It will be impossibl

Unbrick   Zenfone 2   ze550ml/ze551ml Tutorial how unbrick (save) a cable suspended Zenfone 2 (lost bootloader) absolutely can not use or connect ADB recovery, fastboot to perform the operating system reload. How to check that your  Zenfone 2  is bricked ? >>  Device  can not start, only logo  ASUS  quite awhile now off. If you use  keyboard  shortcuts to access cluster bootloader (droidboot),  display  the  cable   connection  icon which is usually called "the hanging  cable ." Device  can not  connect  to your  computer  regardless of whether in any mode (including ADB, fastboot), this leads to not be able to use ADB fastboot. Cause: Loss bootloader Damaged in a bootable partition. -Most Of the  cases  are droidboot.img can  flash  the wrong  file  by other  files  as boot.img, recovery.img or get confused by any other machine on the line. -Case Rare than natural bootable partition defective (not by you impact) or in some  cases  droidboot.img  flash   file  into