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fastboot — Communicate with connected Android devices when in bootloader mode (the one place ADB doesn't work).

Submitted by: @import:tldr-pages··
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clitldrfastbootcommand-line
connectedcommanddevicesclicommunicatewithandroidfastboot

Problem

How to use the fastboot command: Communicate with connected Android devices when in bootloader mode (the one place ADB doesn't work). More information: <https://cs.android.com/android/platform/superproject/+/main:system/core/fastboot>.

Solution

fastboot — Communicate with connected Android devices when in bootloader mode (the one place ADB doesn't work). More information: <https://cs.android.com/android/platform/superproject/+/main:system/core/fastboot>.

Unlock the bootloader:
fastboot oem unlock


Relock the bootloader:
fastboot oem lock


Reboot the device from fastboot mode into fastboot mode again:
fastboot reboot bootloader


Flash a given image:
fastboot flash {{path/to/file.img}}


Flash a custom recovery image:
fastboot flash recovery {{path/to/file.img}}


List connected devices:
fastboot devices


Display all information of a device:
fastboot getvar all

Code Snippets

Unlock the bootloader

fastboot oem unlock

Relock the bootloader

fastboot oem lock

Reboot the device from fastboot mode into fastboot mode again

fastboot reboot bootloader

Flash a given image

fastboot flash {{path/to/file.img}}

Flash a custom recovery image

fastboot flash recovery {{path/to/file.img}}

Context

tldr-pages: common/fastboot

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