Today i have updated my Asus zenfone 2 laser ze550kl firmware from WW-21.40.1220.1708 to WW-21.40.1220.1998. I saw so many peoples are facing issue while updating from WW-21.40.1220.1708 to WW-21.40.1220.1998 so i thought to share the steps i followed for updating the firmware to latest version.
The same steps are used to updating firmware from WW-21.40.1220.1998 to WW-21.40.1220.2087
Steps:
• The batter charging should be above 50%.
• To install latest firmware two folders required
Tools (https://drive.google.com/file/d/0B0aLSwTxUBYETFVvQU1ZUHNFaEE/view ) and
Asus zenfone 2 laser firmware (https://www.asus.com/in/Phone/ZenFone-2-Laser-ZE550KL/HelpDesk_Download/). Please find the screens shot below.
• Copy the tools folder to your personal computer as shown in above screen shot.
• Copy the Zenfone 2 laser latest firmware to SD card .
• Enable USB debugging in Zenfone 2 laser.
To enable developer options click the Build number for 7 times.
To enable debugging options go to settings - > Developer options -> USB Debugging.
• Power off the phone.
• Press
power button and
volume up button simultaneously to enter into Fast boot mode.
• Attach data cable to Personal computer.
• Open the
Tool folder in PC and click the
flast-all.bat file this will open command window and run commands and close automatically once the commands executed successfully.
• Remove the data cable connection from the PC.
• Remove the phone battery and wait for 5 sec and insert the batter again.
• Press
power button and
volume down button simultaneously to enter into recovery mode.
• Select the option
Apply update from SD Card. Use volume button to move up and down and the power button to select the option.
• Select the firmware zip file and press power button. Firmware updating will start automatically.
• The above process will take around 10 to 15 minutes to complete the installation.
• After completion of the installation
reboot phone and your phone updated to latest firmware.
• Take a back up of your personal data and do a Factory Reset.
