This is a proprietary protocol, and tool, as an alternative to fastboot. On Samsung devices, (excluding the Nexus S and Galaxy Nexus devices), power, volume down and home has to be pressed for entering ODIN mode. Google Nexus: Power, volume up and volume down.Zebra and symbol devices: Right scan/action button.HTC, Google Pixel, and Xiaomi: Power and volume down.The keys that have to be pressed for fastboot differ for various vendors. Not all Android devices have fastboot enabled, and Android device manufacturers are allowed to choose if they want to implement fastboot or some other protocol. To use fastboot, a specific combination of keys must be held during boot. Fastboot does not require USB debugging to be enabled on the device. Fastboot on some devices allows unlocking the bootloader, and subsequently, enables installing custom recovery image and custom ROM on the device. If the mode is enabled, it will accept a specific set of commands, sent through USB bulk transfers. It requires that the device be started in Fastboot mode. It is included with the Android SDK package used primarily to modify the flash filesystem via a USB connection from a host computer. It is implemented in a command-line interface tool of the same name and as a mode of the bootloader of Android devices. Firmware communication protocol and implementation thereofįastboot is a communication protocol used primarily with Android devices.
