“fastboot” is a command-line tool that allows you to communicate with connected Android devices when they are in bootloader mode. Bootloader mode, also known as fastboot mode, is a specific state of an Android device that allows for low-level interactions with the device’s firmware and system partitions.
While the Android Debug Bridge (ADB) is a commonly used tool for interacting with Android devices, it is not available in bootloader mode. This is where “fastboot” comes into play. When an Android device is in bootloader mode, you can use “fastboot” to perform various operations, such as flashing custom firmware, unlocking the bootloader, installing system updates, or modifying system partitions.
“fastboot” provides a set of commands that enable you to carry out these tasks. For example, you can use “fastboot flash” to write custom firmware or system images to specific partitions on the device. You can also use “fastboot oem unlock” to unlock the bootloader, allowing you to install custom recoveries or custom ROMs.
To use “fastboot,” you need to connect your Android device to your computer via USB and ensure that the device is in bootloader mode. Once connected, you can execute “fastboot” commands from the command line to send instructions and data to the device.
It’s important to note that using “fastboot” commands requires caution and understanding, as they involve low-level interactions with the device’s firmware. Incorrect usage or flashing of incompatible firmware can lead to device instability or even permanent damage. It’s recommended to carefully follow official documentation and instructions specific to your device or firmware when using “fastboot.”
“fastboot” is commonly used by Android developers, enthusiasts, and advanced users who require deeper access to their devices. It provides a way to modify and customize various aspects of the Android system during the development process or for advanced user customization.
fastboot Command Examples
1. Unlock the bootloader:
# fastboot oem unlock
2. Relock the bootloader:
# fastboot oem lock
3. Reboot the device from fastboot mode into fastboot mode again:
# fastboot reboot bootloader
4. Flash a given image:
# fastboot flash file.img
5. Flash a custom recovery image:
# fastboot flash recovery file.img
6. Display connected devices:
# fastboot devices
7. Display all information of a device:
# fastboot getvar all
Summary
In summary, “fastboot” is a command-line tool that allows you to communicate with Android devices in bootloader mode. It provides a set of commands for performing operations such as flashing firmware, unlocking the bootloader, and modifying system partitions. “fastboot” is particularly useful for developers, enthusiasts, and advanced users who require low-level access and customization of their Android devices.