tldr/pages/common/fastboot.md

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# 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}}`
- Display connected devices:
`fastboot devices`
- Display all information of a device:
`fastboot getvar all`