How to root Asus Zenfone 2 Laser| Unlock Bootloader| Install TWRP
How to root Asus Zenfone 2 Laser| Unlock Bootloader| Install TWRP

Asus Zenfone 2 Laser ZE550KL announced on August 2015 comes with an Octa-core CPU which seems enough to power your daily needs & manage to offer decent battery life. But, if you are a gamer or use your device lot, you’ll experience slowing down because of heavy Apps like Facebook, Messenger etc. Most people remove those Apps to improve performance. While some try the other way i.e rooting their device. If you don’t know about rooting, you can refer our Everything about rooting guide. Most of the guides available online are mostly hard to follow or doesn’t work. Before rooting Asus Zenfone 2 Laser , read the disclaimer. So, lets get started with rooting Zenfone 2 Laser.

Update: 😎 Working On Latest Update Of Marshmallow 😎


You device’s warranty may be void after following below mentioned instructions. If any thing goes wrong and you 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 at your own risk.

Also Read: 

Prerequisite for rooting Zenfone 2 Laser:

  • Additionally, you must have a windows PC.
  • Install USB drivers for your Asus Zenfone 2 Laser ZE550KL.
  • Goto Settings -> About and tap multiple times continuously on “Build number” to active “Developer options” and then goto Settings -> Developer options and enable “Usb debugging” option.

Download Rooting Tools:

How to unlock Bootloader & Root Asus Zenfone 2 Laser :

Step 1: Download all the above tools & transfer all the Apk files in your device.

Step 2: Now Install ZE550KL Bootloaderunlocker.apk in Your Device. Follow Below Screenshot Instruction.

Step 3: Extra ‘ADB Fastboot Tool.rar’

Select Extract To ADB Fastboot Tool
Select Extract To ADB Fastboot Tool

How to Install TWRP Recovery in Zenfone 2 Laser (ZE550KL)

Step 1: Move ze550kltwrp.img into extracted ‘ADB Fastboot Tool.rar’ folder.

Step 2: Now in ADB Fastboot folder open command windows by Pressing Shift+Right click –> open command winnows here. See In Below Image For Easy Understanding.!

Select Open-Command-Window-Here
Select Open-Command-Window-Here

Step 3: Now Enter the Following command in Command Window. (click Ok if Prompt on Your Device)

adb Devices
adb devices
adb devices

It will return your device code which confirms you have installed all the files properly.

Step 4: Now to reboot your device into Fastboot mode which allows flashing files, enter the below command in command prompt. or else you can Manually Reboot To Fastboot Mode By Switch off Your Phone And Press Volume Up + Power Key Together.

adb reboot bootloader
adb reboot bootloader
adb reboot bootloader

Step 5: Now to flash the TWRP recovery, just enter the below command.

fastboot boot ze550kltwrp.img
Installing TWRP
Installing TWRP

Once the flashing process gets completed, your device will automatically reboot into TWRP recovery.

How To Root Your Device ?

First Install TWRP Recovery Using Above Steps 1 to 8.

Step 1: Place The Downloaded SuperSu File into Your Device SD Card or Internal Storage.

Step 2: Boot Into Recovery And Select Install. Now Locate SuperSu Pro.Zip File in Your Device And Flash it.TWRP-Recovery

Step 3: Most Important Part Of Rooting is Patience wait For Minimum 5 Minutes to Boot Your Device. Hurry.. You Done it Well. Check Your Device Root Status By Any Root Checking App. 😀


Now you can flash different mods, custom roms, kernels & lot more. If you are a Xposed lover, you can refer our guide of Installing Xposed Framework & installer in Marshmallow. If you are new to rooting, you can check best apps for rooted Smartphones. You can checkout few mods for improving battery life & performance.

Last updated on: Jul 11, 2016 @ 10:36 pm
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Vijay patel
He is a Gujju Guy who loves to try out new stuffs and explore Technology. Always tries to find the most easiest & efficient way to do a job. VJ is a Proud Geek and tech. enthusiast, who is ardent to learn more about the technology that surrounds us. He loves to tinker around with his gadgets and when he find something new and exciting, he shares it with you on Devs-lab. Last but not the least he is a true gamer by heart.


  1. Unlock app is not able to unlock device…..any 100% fix to this..??

    where is the ADB Fastboot Tool.rar …its not given in the above link..

    plz update this thread to all latest info and tools properly working ..

  2. Took me a while to find the solution. Try finding working drivers for your PC and do NOT forget to reboot your PC after downloading and installing them. Rooted my phone successfully. Thank you so much!

  3. this steps don’t work for marshmellow . . .no matter what the admin says. . .as the unlock bootloader app won’t work. so just downgrade ur device.

  4. i tried all your step and its succesfull but when i open my phone is stock in logo screen ? please help me my mom will get angry if she see this

    Sent From Asus Zenfone laser Ze550KL, Asus_Z00LD

    • to unlock bootloader with above methof you should be on lollipop only then you can successfully unlock bootloader after bootloader unloacked you have to manually install each update to go to mashmallow with stock boot images and stock recovery and firmware update files after you are on marshmallow you can go ahead with flashing Cyanogenmod ROM

  5. Hello brother, I’m using ze550kl running on lollipop. I cannot unlock my boot loader using the app given here or by using the latest version of the same app from ASUS official website. How can I solve this? Please help. After trying the app, phone restarts and the software update notification pops up.
    s/w version: ww_1.17.40.1531

    • I asked for help in July and now it’s almost getting a month! No-one knows , not even the founder admin of this trick, why or what to do!!

      • Bro. We tried Our Best To give You Guyz Solution.!! This Is The Only Method Which Was Worked For All Asus Zenfone Laser user. In Some Cases this Method is Not Working. We Request You to Follow Method Carefully. Bcz This Is The Only one Method By using You Can Root Ur Device. If You Unable To Do that.Wait For Post To be Updated. We Will notify You When ever we Got another Way Of Rooting.

        Thank You.

  6. hi my name is apoorv from india
    so i m at twrp recovery and have downloaded the beta supersu on my phone in downloads when i install that zip file it gave me nothing at root checker it said my phone has not been rooted
    it says like i m only half rooted or something or like not properly rooted

    • there is no way currently for twrp to be permanent but we will surely update guide after get any way to do so..!!

  7. Hi

    Your steps will NOT work on Marshmallow 6.0.1 version.
    Even the XDA sites are confirming that the latest Boot Unlocker will NOT work on Marshmallow 6.0.1.

  8. Hello buddy,

    Since you’ve updated this thread, you should’ve included the latest version of TWRP which is v3.0 I think. So can we flash the latest version instead of the version listed here? If so please update the thread again hosting the latest twrp update.


    • We Not Even Tried To Flash Latet TWRP. As The Old Version is Working Perfect And Ni Bugs There. But Yes. You Can Flash Latest TWRP Version. 😀

  9. hey can anyone provide me the link to stock recovery of android m for asus zenfone 2 laser 550kl and a steps to do that im unable to do hardreset plz help

  10. Thanks, works fine to me! I was having problem with adb, it couldn’t recognize my device, but the trouble was in the cable. When I change the cable everything works just perfect. Best tutorial for asus zenfone 2 laser that i ever found. cheers!

  11. After Marshmallow The Bootloader Unlock App Isn’t Working Stopped Working,I Want To Root Please Fix This.

  12. Vijay patel can you help me? my phones dead now after downgrading from marshmallow. do you have any solutions for this? please help me.

  13. Hello i’m from Indonesia
    I want to ask why my ZE550KL doesnt detect on fastboot mode? I want to root but get this problem how to fix it?

    • Plz Recheck That Driver is Properly Installed. Or Else Try Again With our Guide Step by Step. M sure Your Problem Will be Solved..!!

    • After Update I Personally Faced This Problem. But ignore it And Go to Fastboot Mode Manually And Flash Recovery File. 😀

  14. Does not work for MArshmallow.
    I tried it. twice but got into bootloop.
    Had to flash Marshmallow all over again.
    Please post separate post after trying it yourself.
    Thank you for the support anyways !!

  15. Hai bro,

    My phone model is ze550kl I recently updated marshmallow now i cant unlock bootloader why??can you tell me please

  16. hey bro,
    I got a bootloop i’m running the nightly vesrion build 12/06 after this update installed and restarted my phone got into boot loop..though i formatted it does not go..any help?

    • Goto Recovery. And Wipe Data, Cache.

      Re Flash that Zip Step By Step Maintained By Developer Of that Rom And If Still Got Bootloop Report Problem To that Deveoper.

      For. Current Use You May Wipe Data, cache. And Flash Any Other Rom Which iS Fully Out Of Bug. And In Working Mode.

      • i am using asus zenfone 2 laser and i only have CM to install. I did all those but still didnt work. It works when i install the old april build. Y like this?? can you help?

        • flashing method is same for all roms. so just follow above guide to root and install recovery. after that flash new rom by going to recovery..!!

      • i am also unable to go into fastboot mode..though I type the command correctly it restarts the phone to normal state

  17. Hey buddy, I’m using Asus ZenFone 2 laser ze550kl, running on lollipop 5.2 and build no:

    I want to know whether this build number is supported by your root method? ☺


    • This Method is Universal Method. Does’t Matter Which Version You using. Just Matter What is Which Device You using.?

      • Thanks for the info. One more doubt, can we update “super su” with the latest version after flashing this version? Usually people say dont update supersu after flashing it. Also, does unlocking boot loader initiates a factory restore and hence full data lose??

        • No Data lost in unlocking bootloader.!! And Also no Need to update Super Su. You Will Got Notification For SU binary To be Update if its out of date. then just install it.. Till then No Need to update Super Su!!

  18. Thank you very much for your grateful work. WW_1.17.40.1234 rooted as above steps (drivers already installed).

    Can i update to Marshmallow? I have downloaded from asus site.

    After update, again unlock boot loader? again root?

    By which method? Place in root directory and restart? ADB fastboot (like rooting)?

    • Yes You Can Update To Marshamallow. by That Downloaded Zip File From Asus. no Need To unlock Bootloader Again As Your Device Bootloader is Unlocked And Rooted Already..!!

    • Yes. you Can Apply. Does’t Matter Which Version You Using. Just matter What is Which Device You using.!!

  19. unlock boot loader is not installing the asus zenfone 2 laser ze500kl model ….can u help how to unlock the boot loader….

  20. Still not able to unlock my device’s bootloader. When i run the unlocker tool after agreeing to its terms my device reboots. But when i connect my phone and enter the command fastboot oem device-info it shows ‘device unlocked – false’

  21. help me . i am not able to root my device.
    i have unlocked my bootloader.
    but when i try to install the boot img
    it shows:-
    FAILED (remote: bootimage: incomplete or not signed)
    finished. total time: 0.859s

  22. sir, there z no option to download adb fastbool tool.rar file….rather nly the .exe file z available for download…plz provide the link of the rar file

  23. Sir, adb fastboot tool.rar file z not available for download…nly the minimal adb fastbool tool.exe file z available for download…plz provide the link to download the rar file

  24. I tried to root my phone using this method i’m on 1.15 build when i tried the flashboot command it said that my phone is still locked.Then i found out that you can unlock your phone using the apk only if you are on the 1.16 build.Before, i used to get a message that a system update is available but now when i check for system update it just loads and stops.Please help me.

    • its Seem May be Your Bootloader is Unlocked..!! So You Will Not Got Any Official Update From Asus. you Can Check Bootloader Status By booting into fastboot mode.

      Type this Command with out quote- “fastboot oem device-info”

      if you Want to update Your Device to V.1.16 and As You maintained in Comment You not Got Update In System update Check.. you Can update to V.1.16 by Manually Update. to Do So you Have to Download Firmware Version 1.16 From Here. now Copy this Zip File into your SD Card And You will Got Notification On Your Device About System update Just Click On it And install..!!


    • Nop..!! this Method Is Totally Safe.. no Data Will loss During Rooting..!! Plz Use This Guide And Follow Each Steps Carefully.!!


  25. my phone is not getting detected while giving command adb devices
    what should I do?
    I have installed adb and fastboot through setup several times!
    I have also unlocked it using apk given by you.
    but still everything in vain

    • i think Problem is in CMD.!! You Have To Open CMD in ADB Folder By Pressing Shift+Rgt Click And Select Open CMD Here option From List..!! Then try It..!! I Request You To Disable Your Antivirus During This Process.. Follow Each Steps Carefully And Try Once Again.!! if Still Getting Errors Try With Another PC.!!

  26. hey bro after installing cm13 my device says root acces is not properly installed..what to do? and if i try to root it goes into boot loop. can you help me out with this?

    • Rooting Method is Same For Stock ROM or Any Other Unofficial ROMS..!! So You Can try Above Method For Rooting.!! As You Maintained You GOT In bootloop While Rooting On CM13 SO I want to Advice You TO Follow Each Steps Carefully And Try Rooting.!! Bcz Personally i Rooted My Device Using Same Method On CM13 And Working Fine Without Any Problems..!!

  27. hey bro after I updated to version 13/11 device stuck in boot loop..and after installing the cm13 it shows as the device is not rooted. how to root it again? or what is the problem..could you help me out?

    • Rooting Method is Same For Stock ROM or Any Other Unofficial ROMS..!! So You Can try Above Method For Rooting.!! As You Maintained You GOT In bootloop While Rooting On CM13 SO I want to Advice You TO Follow Each Steps Carefully And Try Rooting.!! Bcz Personally i Rooted My Device Using Same Method On CM13 And Working Fine Without Any Problems..!!

  28. I think my device is still locked even after using Unlock Device Tool…because this command
    fastboot boot boot_200007.img
    gave me an error that device is locked…
    Please help me in unlocking the bootloader. I’m on 1.17.40 build.

    • Yes.. After Update.. Some User Of Zenfone 2 Laser Face This. Issue.. We are Trying To Find A Better Solution.. When We Got Proper Solution For It.. Surely It Will Be Updated..and.. We Will Inform You That..!!

      Thanks For Support
      @Devs-lab Team