Rooting of smartphones has become important these days. We all want to try out new ROMs in our smartphones and for that, we need a rooted device. The very first basic requirement for rooting is unlocking the bootloader. You can unlock the bootloader of any Android device in few simple steps. In this guide, we will help you in unlocking the bootloader of Lenovo devices.

Lenovo came back into the smartphone market with the launch of its K series smartphones. Lenovo K3 Note and K4 Note are still in demand and doing a decent business as well. No matter which device you are using, rooting will always attract the user thanks to the multiple options that becomes available after rooting. This tutorial will enable you to unlock the bootloader of any Lenovo device so that you don’t feel restricted while using your phone.

Requirements

  • Take the backup of your device as unlocking will wipe all the data present on your phone.
  • Make sure your device is at least 50% charged.
  • You have a USB cable to connect your device to PC.
  • Unlocking of Bootloader may void the warranty of the device.

Step 1: Installation of ADB & Fastboot on your PC

Android Debug Bridge or more popularly known as ADB and Fastboot plays a vital role in bootloader unlocking. Without the presence of ADB & Fastboot, you won’t be able to connect your Lenovo device to PC. ADB helps in sending the basic commands of Linux from PC to phone while Fastboot helps in flashing any type of partition on the phone.

  • Click here to download ADB & Fastboot Installer.
  • Once downloaded, run the setup and you will be greeted with a command prompt with a blue background.
  • Now, you just need to agree to all the prompts. For doing so just type Y and press Enter.
  • Once this is installed, the set up will close on its own.
  • Good thing about this ADB installer is, it automatically installs drivers for your Lenovo device too.

Step 2: Before Unlocking

Before unlocking the Bootloader, you must make your phone ready for it.

  • Go to Settings > About Phone > Build Number. Click on Build Number until you see the message “You’re now a developer!” Alternatively you can check our guide to enable developer mode on your Lenovo device.
  • Now, go back to Settings > Developer Options. Tap on OEM Unlocking and USB debugging to enable these options.
  • Enabling the OEM will ask for the Password/PIN. Enter the desired password to enable the OEM Unlocking.USB Debugging will also prompt a warning message, click OK to enable it.
  • Switch Off your phone and restart in Fastboot mode by pressing Power and Volume Up button at the same time.

Step 3: Unlocking the Bootloader

  • Connect your phone to PC via USB and open Command Prompt pressing Shift + Right Click and clicking on “Open Command Window Here”.
  • Enter
    adb reboot bootloader
  • command in Command Prompt Window and Press Enter. On doing this Phone will enter to Fastboot mode.
  • Now, enter the below command
    fastboot OEM unlock

    in the command prompt and press enter. Your bootloader is unlocked now.

  • Just restart your phone normally and you are all set to enjoy the freedom of unlocked bootloader.

You may get many warning prompts while unlocking the bootloader, you just need to accept these warning signs as a manufacturer of the device doesn’t want you to play with the company defined settings. You will now be able to install TWRP recovery and root your Lenovo devices. Let us know if you are still facing any issue in unlocking the bootloader of your Lenovo device.

  • It worked just fine! Thanks!

  • its not working in lenovo vibe k5 note

    • It’s probably because Lenovo doesn’t want to let you unlock the bootloader of the device. For some devices, the bootloader can’t be unlocked, because the manufacturers restrict it. However, in your case, you can downgrade your device to Android Lollipop and probably try unlocking the bootloader. It should work.

      Also, if you plan to just flash the custom recovery, then try flashing it without unlocking the bootloader. If that works, it’s probably the same issue that came on the earlier Android One devices

      P.S: This is something I think, in case you end up losing your important data or end up in a problem with your device, Neither AndroidTutorialsHow nor I will be held responsible.

  • Hello,
    whether the above command can be for Lenovo a6600d40

    • Lenovo doesn’t allow you to unlock the bootloader of some of their devices. Check if Lenovo allows unlocking the bootloader of your device. There’s not much information available, we’re contacting the company for more information on the same. Will update you once I get a response from them, till then stay tuned.

  • No OEM unlock option In developer settings in lenovo s660

  • How do you Lock the bootloader on a Lenovo Z5?

    • Hello Karon,

      Thanks for the response. It’s pretty simple.

      You just have to boot your device into fastboot mode, connect it to your PC and enter “fastboot oem lock”

      Since you’re asking for locking the bootloader, I’d assume that your device is already unlocked and you’ve installed ADB and Fastboot on your computer system. In case you’ve not unlocked the bootloader yourself, then follow this guide till step 2 and in step 3 use the lock command: fastboot oem lock

      Source: https://android.tutorials.how/fastboot-commands/#FastbootOEM_lock_command

  • I have lenovo tab 3 7″ essential and I can’t unlock boot loader but adv and fastboot work. All I want to do is change “charge-mode-off” to off. I can’t do this without unlocking boot loader. I tried looking for battery lpm file as well but it doesn’t exist so I’m stuck. Can anyone help?

  • can it be done for Lenovo vibe k5 note?

  • Will it work on my lenovo k4 note android version 5.1?

  • Hello,
    I already used this step but it didn’t work
    I typed the following commands
    Adb devices
    Adb reboot bootloader
    Fastboot devices
    Fastboot OEM unlock/fastboot flashing unlock
    Then it came “remote’unknown command'”
    Please fix this problem for me
    It means lot to me

  • Will it work on lenovo k10a40 (c2 power)

  • Thank you for the information but do you know how to lock it back for the Lenovo K50-T5? Because since I did a ROM change with Smart Phone Flash Tool I can’t watch my cable company live streaming on their app because it says they block “rooted phone” and I never rooted it I supposed it’s the bootloader that is unlocked. But when I try the command “fastboot OEM lock” it doesn’t recognize the command. Any solution? Or maybe a real stock ROM for my phone? By the way I am still with Android 5.0 is there any better real stock ROM from Lenovo for my phone like Android 6.0? I saw one for Lenovo K3 Note but is it the same thing as the K50-T5 phone? Thank you!