Asus released new OTA update on 24th Feb 2016 i.e Version V126.96.36.1996. But it has many issues like mic-issue, frequent lagging issues and most important Asus revoked third party theme support in this latest update which freaked most of the Asus users. So Now As we All know there is no any downgrade version available for Asus Zenfone 2 Laser(ZE550KL). Lets begin with Downgrading Asus Zenfone 2 laser.
Well, manufacturers don’t support downgrading to old software version even though the current version is buggy. But there’s no other way to fix this new issues except Downgrading firmware version. This guide was used to downgrade 3 Zenfone 2 Laser devices to make sure it works perfectly & can be implemented easily.
Also Read: List of all Cyanogenmod 12/12.1/13 Themes
If any thing goes wrong and you just end up with a bricked or semi-bricked device then neither our site or any of these app developers will be responsible. So, try these instructions on your own risk.
Note: I downgrade my Zenfone 2 laser by following this method without any data lost. But for safety reasons, I would advise you to take backup of your important data.
Prerequisite for Downgrading Asus Zenfone 2 Laser (ZE550KL) Firmware:
- Additionally, you must have a windows PC.
- Install USB drivers for your Asus Zenfone 2 Laser ZE550KL.
- Enable USB Debugging in Asus Zenfone 2 Laser: Go to Settings -> About and tap multiple times continuously on “Build number” to active “Developer options” and then Go to Settings -> Developer options and enable “USB debugging” option.
- ADB Fastboot Tool.rar
- ADB & Fastboot Driver (Easy Installation)
- Firmware Version Which You want To Install
How to downgrade Asus Zenfone 2 Laser (ZE550KL):
Step 1: Download the above files & Move Firmware.zip file to root directory of your SD card
Step 2: Extract ‘ADB Fastboot Tool.rar’.
Step 3: Move Stockboot.img into extracted ‘ADB Fastboot Tool.rar’ folder.
Step 4: Now in ADB Fastboot folder open command windows by Pressing Shift+Right click –>Open command window here. You can refer the below image.
Step 5: Now Enter the Following command in Command Window. (Click Ok if Prompt on Your Device after entering the below command)
If you found your device in list if you have properly installed USB driver and you are good to go!
Step 6: Now to boot your device into fastboot mode (To flash/install old firmware). Enter the below command.
adb reboot bootloader
Step 7: Now its time to flash stock boot.img file. Enter the below command. By Flashing this boot.img File Your Device Will Automatically Reboot into Asus Stock Recovery Version WW188.8.131.523. If you got Error Something Saying To Unlock Your Device!! Just Click Here and Follow First Two Steps Of That Post. And Try Again Using This Command.
fastboot boot Stockboot.img
Step 8: Now in Recovery Select “Apply Update From SD Card”. Locate the firmware.zip file And flash it.
Step 9: The process might take 4-5 mins. After successfully installation, reboot your device and check Settings > About Phone > Software information. You have successfully downgraded your Asus Zenfone 2 laser without rooting.
Now as you have downgraded to previous version, its time to enjoy third party themes. You can checkout list of all third party theme for Zenfone models. If you need any help, you can comment below. Peace!