This could be due to a faulty USB connection, debugging, or corrupt or wrong USB drivers. Whatever the reason may be, it can be fixed.  Here, we will discuss various troubleshooting methods to resolve this issue, along with the causes of its occurrence. 

What does the ADB reboot bootloader do? 

Android Debug Bridge (ADB) reboot bootloader is a command that can reboot your Android phone into bootloader mode. It is a separate boot mode from Android OS and helps root the device, unlocking its bootloader or flashing firmware.  The bootloader mode allows you to access partitions you can’t access from Android OS. Advanced users primarily use it to access specific system files and troubleshoot issues on the device.  SPONSORED

What causes the ADB reboot bootloader not working issue?

The Android Debug Bridge reboot bootloader command might not work for several reasons. Some of the popular ones are listed below: 

The device is not connected correctly – If your Android is not connected to your computer correctly, this mode might not work. Check the USB cable and replug it to establish a connection. Outdated USB drivers – If your device is connected to a USB and your computer is missing the correct USB drivers, then the bootloader won’t work.  USB debugging disabled – To enter developer mode, it is essential to turn on USB debugging. If it is not enabled, then you can face the issue.  Outdated version of ADB – If you don’t have the latest version of ADB installed on your computer, you can get the issue. 

How to get ADB reboot bootloader working?

Before moving to the troubleshooting steps, please go through these preliminary checks to fix the issue: 

Check the cable you use to connect your Android and computer for any physical damage.  Make sure your Android and computer have no pending updates.  Use USB 2.0 for lesser conflicts. 

1. Update the USB drivers 

2. Check if USB debugging is enabled 

Go to Settings.  Click About Phone.  Tap on Build Number (MUI) seven times to get into developer mode. Once done, close the Settings app.  Relaunch the Settings, click Additional Settings, then tap Developers options.  Tap on USB debugging to enable it.  If it is enabled, disable it, wait for a few seconds, and will allow it again. 

3. Clean Install of ADB drivers 

4. Check if the ADB daemon is running in the background

5. Check OEM lock is enabled 

You must check if OEM locks your device if nothing works for you. Some devices come with an OEM lock, which stops the user from flashing firmware and unlocking the bootloader. First, you need to check on the device manufacturer’s website or device manual. If that’s the case, you need to connect your device to the computer and use a tool to unlock your device.  Disclaimer: this program needs to be upgraded from the free version in order to perform some specific actions. So, these are the methods you need to follow to fix the issue of the ADB reboot bootloader. Try them and let us know which worked for you in the comments below.

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