| Unlock Bootloader: | fastboot oem unlock | (Allows flashing of custom images. Some devices may require additional steps or confirmation.) |
| fastboot flashing unlock | ||
| Lock Bootloader: | fastboot oem lock | |
| fastboot flashing lock | ||
| Flash Recovery: | fastboot flash recovery <filename>.img | (Replaces the current recovery with a new one, usually a custom recovery like TWRP.) |
| Flash System Image: | fastboot flash system <filename>.img | (Flashes a new system image, often used to install a new OS version or custom ROM.) |
| Reboot Device: | fastboot reboot | (Restarts the device normally.) |
| Reboot to Fastboot: | adb reboot fastboot | (Reboots the device into fastboot mode.) |
| Reboot to Recovery: | fastboot reboot recovery | |
| Erase Partition Data: | fastboot erase <partition> | (Clears data from a specific partition, like userdata, cache, etc.) |
| Format Partition: | fastboot format <partition> | |
| Check Device Connection: | fastboot devices | (Lists devices connected in fastboot mode.) |
| Get Device Information: | fastboot getvar all | (Displays detailed device information like serial number, hardware info, etc.) |
| Flash Specific Partitions (e.g., Bootloader, Radio): | ||
| Bootloader: | fastboot flash bootloader <filename>.img | |
| Radio (for devices with separate radio firmware): | fastboot flash radio <filename>.img | |
| Boot an Image Temporarily (without Flashing): | fastboot boot <filename>.img | (Boots an image without flashing it, useful for testing custom recoveries or kernels.) |
| Set Active Slot (for devices with A/B Partitions): | fastboot –set-active=<slot> | (Sets the active partition slot to either a or b.) |
| Flash Multiple Partitions at Once: | fastboot -w update <filename>.zip | (Flashes all partitions listed in a specified update package, typically used for full OTA updates.) |
| Display Variable Information (like current slot or partition layout): | fastboot getvar <variable> | (Examples of <variable>: current-slot, partition-size:<partition>, version-bootloader, version-baseband.) |
| Resize a Partition (for devices that support it): | fastboot resize-partition <partition> <size> | (Resizes a specified partition to a new size. Requires compatible firmware and device support.) |
| Erase Specific User Data (Useful for a Factory Reset): | fastboot -w | (Performs a full wipe of userdata and cache partitions.) |
| Enable/Disable Verity (used for device integrity checks): | ||
| To disable: | fastboot disable-verity | |
| To enable: | fastboot enable-verity | |
| Reboot to Bootloader (Useful if chaining commands): | fastboot reboot bootloader | (Restarts the device back into bootloader mode without fully booting it up.) |
| Flash a Partition with Sparse Images: | fastboot flash <partition> <filename>.img_sparsechunk<N> | (Flashes a sparse image chunk by chunk. Often used with images for Moto and Nexus devices.) |
| Erase Cache Partition: | fastboot erase cache | (Clears the cache partition, sometimes useful for fixing boot issues.) |
| Continue Boot (Use if Boot Process is Paused by Bootloader): | fastboot continue | |
| OEM Commands (Device-Specific): | fastboot oem <command> | (For example, fastboot oem unlock-critical to unlock additional partitions on some devices.) |
| Bootloader Lock Status Check: | fastboot getvar unlocked | (Checks if the bootloader is currently locked or unlocked.) |
Android Fastboot Mode Commands with Examples
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