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This wikiHow teaches you how to use Android Debug Bridge (ADB) for Windows to unlock the bootloader – the program that boots the system and the operating system that comes pre-installed on Android devices. Warning: this method has the potential to reformat the device. Make a backup before doing so.
Steps
Install Android Debug Bridge (ADB)
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Open a web browser on your computer.
- The article is based on Windows operating system, but the process is not much different on a Mac.
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Go to https://androidmtk.com/download-15-seconds-adb-installer .
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Click on ADB Installer v1.4.3 . As of August 16, 2017, this is the latest version. If you see the word “Latest version” next to something else, click that link.
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Click Download . This is the big green oval button. The .zip file containing the “.exe” installation file will begin downloading.
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Double-click the downloaded file. The contents of the .zip file will open.
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Double-click the file with the “.exe” extension located in the .zip folder. This file will be named “adb-setup-1.4.3.exe” or similar. The command line screen will open and ask if you want to install ADB and Fastboot. [1] X Research Source
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Click Y . Now the system will ask if you want to install system-wide ADB.
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Click Y . A notification about installing drivers for the device will appear.
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Click Y . After a while, the Device Driver Wizard installer will appear.
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Click Next .
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Click Finish . ADB will begin the installation on the computer.
Lock bootloader
Connect the Android device to the computer via a USB cable. If you do not have a USB cable with your device, use another compatible alternative cable that is safe for your device.
- Depending on the device, you may need to install a driver in order for your computer to recognize your Android device. Visit the phone or tablet manufacturer’s website to download the driver.
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Press ⊞ Win + S to open the search bar on Windows.
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Enter cmd . A list of matches will appear, including “Command prompt”.
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Right click on “Command prompt” and select Run as administrator . As such, you will be able to use the command line with admin rights.
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Click Yes to confirm. A command line window will open.
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Type adb reboot bootloader and press ↵ Enter . The ADB program will launch.
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Type fastboot oem lock and press ↵ Enter . The command will execute and lock the bootloader. If an error message appears, try entering one of these two commands:
- fastboot flashing lock
- OEM relock
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Type fastboot reboot and press ↵ Enter . The Android device will reboot and lock the bootloader.
X
This article is co-authored by a team of editors and trained researchers who confirm the accuracy and completeness of the article.
The wikiHow Content Management team carefully monitors the work of editors to ensure that every article is up to a high standard of quality.
This article has been viewed 3,525 times.
This wikiHow teaches you how to use Android Debug Bridge (ADB) for Windows to unlock the bootloader – the program that boots the system and the operating system that comes pre-installed on Android devices. Warning: this method has the potential to reformat the device. Make a backup before doing so.
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