: On many devices (like Pixel or Motorola), Fastboot commands are used to unlock the bootloader, which is the first step toward rooting or installing custom ROMs like LineageOS.

Fastboot is a part of the Android SDK Platform-Tools. Unlike the standard Android OS, Fastboot runs in the or secondary bootloader mode. This means it can start before Android itself loads, allowing you to flash images directly to the device's internal memory. Core Functions and Capabilities

: When a phone is stuck in a "boot loop," Fastboot is often the only way to communicate with the hardware to wipe data or re-flash system files.

Understanding Fastboot: A Deep Dive into Android’s Core Utility

What Is Android Fastboot Mode and How Does It Work? - miniOrange

: It is the primary tool for installing custom recoveries (like TWRP ), kernels, or entire "stock" factory images to restore a bricked device.