How To Downgrade Asus Zenfone Two Firmware
Yesterday ASUS gave us recent update inwards ZenFone 2 ZE551ML 2.20.40.156 as well as ZenFone 2 ZE550ML 2.20.40.135. Personally I don't similar this update because Now I can't role 3rd political party Themes, which y'all must download from Theme Store for free/paid themes from ZenUI designer as well as I don't run into whatever skilful themes except Speed Themes :). This tutorial is applicable for Downgrading Firmware or fifty-fifty dorsum to stock rom. Please produce it carefully as well as DWYOR (Do it alongside your ain risk) because incorrect motion may drive the device brick :)
Resources:
- ADB Fastboot Installer (Download Here if y'all don't convey it)
- ZenFone ii Original Recovery.img, bootloader.img, boot.img (ZE551ML | ZE550ML)
- ZenFone Firmware (ZE551ML | ZE550ML) <-select OS Android as well as download your firmware
How to Downgrade ASUS Zenfone ii :
- In this tutorial I volition downgrade from 2.20.40.156 to 2.20.40.139
- Download ADB as well as Install it
- Download Recovery.img, bootloader.img, boot.img (lower version than your electrical flow version)->I download 2.20.40.97 - must lower than 2.20.40.156
- Download Firmware (lower version than your electrical flow version) -> I download 2.20.40.139 version
- Place Recovery.img, bootloader.img, boot.img to Downgrade Folder
- Go to Fastboot Mode (Turn off device as well as press power+volume up) or conncet the device to pc/laptop at downgrade folder press shift+right click -> opened upwardly ascendance hither as well as type adb reboot bootloader (need usb debugging activated)
- Connect your Zenfone ii to PC/Laptop
- Type on CMD (press come inwards later on each line): fastboot flash fastboot droidboot.img
- Enter recovery (Tutorial Here)
- Select Apply update from adb
- Open Ze551ml firmware folder and press shift+right click > opened upwardly ascendance here
- Connect your Zenfone ii to PC/Laptop
- Type on CMD (press come inwards later on each line): adb sideload UL-Z00A-WW-2.20.40.139-user.zip
- Factory Reset (To avoid a crash error, but non perform mill reset is ok)
- Done
fastboot flash recovery recovery.img
fastboot flash kick boot.img


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