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How to Re-lock Google Nexus 10 Bootloader

Earlier today you’ve learned how to unlock the Nexus 10 Bootloader, and now you will learn how to re-lock it in case you need it. Follow all the instructions that I have listed in this post and you’ll manage to complete the tutorial in no time.

Read the entire post and make sure that you don’t skip any steps that I have listed here. Unlocking the bootloader of your device will void the warranty, which is why we’ve decided that it would be great for user to know that they can also re-lock the bootloader and restore their Nexus 10 warranty. Relocking the device is easy and you should now move to the preparation part of this post and learn what you should do before moving to the tutorial. Here it is:

  • This tutorial will re-lock only the Google Nexus 10 tablet. Do not try to flash the files on any other Android device.
  • The computer you’ll use to flash the files should have the Android SDK installed on it ( link here ).
  • Enable the USB debugging option on your device.
  • Remember to charge the tablet’s battery so that it won’t power off during the re-lock process.
  • Backup all the data that is currently stored on your tablet.
  • The Nexus 10 should be running a stock recovery image and not custom ones like CWM or TWRP. Also, no other modifications should be present on your tablet.
  • Please note that we cannot be blamed in case you brick the device. Make sure that you know what you’re doing and that you don’t skip any steps I’ve listed below in the tutorial guide.

I think that these are all the general guidelines you had to read and now you’re free to move to the ‘how-to’ part of this post. In case you’re having trouble in completing the process, tell us in comments where you got stuck and we will try to help you.

How to Re-lock Nexus 10 Bootloader:

  1. Get the Fastboot zip file HERE. If you already have this file, skip this step.
  2. Make sure to extract the contents of the zip downloaded at step 1, and that the files are saved to a folder named ‘Fastboot’ on your desktop screen.
  3. Power off your Nexus 10 tablet.
  4. Boot it into fastboot mode by pressing at the same time these buttons: volume up, volume down and power. When the ‘Start’ text is displayed on your tablet, release the buttons.
  5. Use the USB cable and connect your Nexus 10 to your PC. Wait until Windows finishes the installation of the device’s drivers.
  6. Open the ‘Fastboot’ folder. Press the Shift button on your keyboard and while you’re keeping it pressed, you should right-click on the white space in the Fastboot folder. Select ‘open command window here’ from the context menu options. If you cannot do this, then you should run CMD from the Start Menu and then point it to the desktop Fastboot folder.
  7. Enter these command lines in the Command Prompt window and you’ll re-lock the Nexus 10 bootloader:
    • fastboot devices – this will detect your device ID. If it doesn’t then you should re-install them using the Android SDK link, it’s in the preparation guide above.
    • fastboot oem lock – this line will re-lock the Nexus 10 bootloader.
  8. Your Nexus 10 will now restart and its bootloader is in a ‘locked’ state again.

That’s it, you’ve successfully flashed all the required files in order to re-lock your tablet.

If you cannot complete the tutorial, then you should tell us in comments exactly which steps you took and where you got stuck. We will try to come up with a solution. However, remember that we cannot be blamed in any way in case your device doesn’t work after applying the steps listed above.

Google Nexus 10 Articles