Locking your tablet

A step-by-step guide to lock the bootloader on android

For flashing custom ROMs and rooting your device, you have to unlock bootloader of your phone. It is supported on several phones. 

Install ABD (Android Debug Bridge)

  • Open your web browser. Remember, this guide needs windows, and the process is similar to the process of Macs.
  • Type in .
  • Tap on ADB Installer v1.4.3 or the latest version. You can complete this process with the latest version.
  • Tap “Download” an oval green large button. Once the download is finished, you will get a Zip file containing an installer file that ends with .exe.
  • Double-tap on the download files and opens its content. Double-tap Zip file that must end with .exe. It may be similar to “abd-setup-1.4.3”. It opens a screen (command prompt) asking if you have to install Fastboot and ADB.
  • Press “Y”. You may be asked if you have to install system-wide ADB.
  • Tap “Y” and you will check a message about the installation of device drivers.
  • Press again “Y” and after some moments, the wizard of device driver will appear.
  • Hit “Next”.
  • Tap “Finish”. ADB will be installed to your PC.Locking your tablet

Check the Bootloader

You have to connect your tablet with a USB cable. If the cable is not available, you can use a compatible, but safe version. Based on your device, you have to install drivers so that your PC can recognize Android. Get these drivers from your tablet or phone manufacturer’s website.

  • Tap on Win + S to open search bar on a computer with Windows.
  • Now type cmd. And a list of matching results will appear along with command prompt.
  • Right-click on “Command Prompt” and choose “Run as administrator”. With this step, you will get command prompt of an admin-level.
  • Tap “Yes” to confirm and open a command prompt.
  • Click adb reboot bootloader and hit “Enter”. It will run the ADB program.
  •  Type “fastboot lock” and hit “Enter”. This command must run and lock your bootloader. If you are noticing an error message, you can try these commands:
  • Fastboot flashing lock
  • Oem relock

You have to type “fast reboot” and tap “Enter”. It will reboot your Android device and locks a bootloader. 

If a device is only rooted, you can go back to the default version of a phone. In this situation, unrooting can be easy. The SuperSU app can make unrooting easy by removing roots and replace stock recovery of Android. A phone with a custom ROM or Xposed Framework may need alteration of individual parts in the system. 

Sometimes, the above methods will not work appropriately because your device needs stock recovery. Try to find a stock framework of your device to bring it back to an unrooted state.

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