How To Unlock Bootloader On Lenovo Z5 by using ADB Fastboot Method

Lenovo Z5 is a great handset in terms of appearance and performance. The Lenovo Company launched the device in June 2018. Today we will guide you on How to Unlock Bootloader On Lenovo Z5 (L78011). To flash or root and even install custom ROM you need to unlock the bootloader on your device.

Lenovo Z5 features a 6.2 inches IPS LCD display with a screen resolution of 1080 x 2246 pixels. The device is powered by Qualcomm Snapdragon 636 processor under Adreno 509 GPU. The smartphone packs 64/128 variant with 6GB of RAM. Lenovo Z5 sports a dual rear camera with a 16MP + 5MP camera and Selfie camera with an 8MP camera. The smartphone is running on Android 8.1 Oreo under ZUI 3.9 software package and backed by 3300 mAh battery.

Now you can unlock bootloader easily by following this simple guide. Official Bootloader Unlock for Lenovo Z5 (L78011) will also void the device warranty. So if you planning to Unlock Bootloader On Lenovo Z5, then it’s always better to wait until your warranty gets over. In case if you have unlocked the bootloader, then you can always relock the bootloader on your device anytime.

How To Unlock Bootloader On Lenovo Z5 by using ADB Fastboot Method

What is Unlock Bootloader?

A Bootloader is a code which runs when we turn on our device. This code initializes some hardware and then loads the kernel and ramdisk, and gets the boot process going. So this process is known as Bootloader. The same concept applies to all the technical stuff such as Laptop, PC, Smartphones and any such device. Every Android OEM manufacturers lock the bootloader even though it is an Open Source. So if you want to try any CUSTOM ROM, it is impossible to load the CUSTOM ROM without the Unlock Bootloader. So Manufacturer made a policy of making the smartphone with Unlocked Bootloader will void the warranty. They want you to stick with the Stock ROM. Unlock Bootloader allows you to Root your android smartphone, Flash TWRP and Custom ROM in a simple easy method.

By Unlocking the bootloader, your warranty can void. So take your own risk. We are at GetDroidTips will not be responsible for any bricking/damage to your phone while/after installing this ROM.


  • To Unlock Bootloader On Lenovo Z5 (L78011), you need a laptop or PC.
  • Charge the Lenovo Z5 to a sufficient battery level to avoid any sudden shutdowns during the process.
  • We strongly recommend you to take a complete full backup of your personal data, including the internal storage. The phone will be formatted, so be prepared for it. You can also follow our Android backup guide for the same.
  • You need a USB cable to connect your phone to PC.

Required Files on your PC:

Steps for How to Unlock Bootloader On Lenovo Z5 (L78011)

  1. First of all, enable the Developer Option
  2. To Enable the Developer Option, Go to your Settings -> About -> Software Information -> More -> Now Tap on the Build Number 7-8 Times until you see a toast message “Developer option enabledbuild
  3. Go back to settings -> Now you need to enable the OEM Unlock by going to Settings -> Developer Option and Enable OEM Unlock and USB Debugging

    OEM Unlock
  4. Download and Extract the Downloaded ADB fastboot Zip file on your PC.
  5. Now connect your phone to Computer using USB Cable.
  6. When you connect your Phone to Computer, please wait until all the drivers get installed.ADB Folder
  7. In your ADB fastboot folder open a command prompt window by pressing Shift Key + Right Mouse Click 
  8. Now type the command in your command window
    adb devices
  9. If you see a pop up to allow USB Debugging on your phone, Click OK pop up to allow USB Debugging
  10. Now type the command below to reboot your phone to bootloader
    adb reboot bootloader
  11. Once your phone reboot into bootloader, make sure your phone shows the bootloader locked and then type the command below to make sure fastboot drivers are installed properly.
    fastboot devices
  12. This command will list the connected devices. If your phones serial number shows up you are good to go and may continue. If the phone is NOT listed this indicates that your drivers are not installed correctly. In order for you to continue, you must fix your drivers so that your phone is listed under fastboot devices.
  13. If the phone has been recognized by the command above, proceed to unlock the bootloader with the following command:

    Remember that this step will wipe EVERYTHING off the phone 

    fastboot oem unlock
  14. After the above command has finished executing, run the following
    fastboot reboot
  15. The phone will reboot. Wait until the phone has fully booted up into Android, and enjoy!

I hope this guide was helpful to Unlock Bootloader On Lenovo Z5 (L78011). If you have any queries or feedback, please leave a comment below.


  1. Hello, I tried this procedure but it gives me an error.
    This is what comes out.
    D:\SmarthPhone\1 Android\ADB 2020>fastboot oem unlock

    FAILED (remote: unknown command)
    finished. total time: 0.009s

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