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Odin is a utility software program developed and used by Samsung internally which is used to communicate with Samsung devices in Odin mode (also called download mode) through the Thor (protocol). It can be used to flash a custom recovery firmware image (as opposed to the stock recovery firmware image) to a Samsung Android device.
Screenshot of Device Manager, containing a Qualcomm device booted in the Emergency Download Mode. The Qualcomm Emergency Download mode, commonly known as Qualcomm EDL mode and officially known as Qualcomm HS-USB QD-Loader 9008 [1] is a feature implemented in the boot ROM of a system on a chip by Qualcomm which can be used to recover bricked smartphones.
Firmware communication protocol and implementation thereof Fastboot is a communication protocol used primarily with Android devices. [ 1 ] It is implemented in a command-line interface tool of the same name and as a mode of the bootloader of Android devices.
Team Win Recovery Project (TWRP), pronounced "twerp", [4] is an open-source software custom recovery image for Android-based devices. [5] [6] It provides a touchscreen-enabled interface that allows users to install third-party firmware and back up the current system, functions usually not supported by stock recovery images.
A Samsung Galaxy A02s booted into recovery mode. The Android recovery mode is a mode of Android used for installing updates and wipe data. [1] [2] It consists of a Linux kernel with ramdisk on a separate partition from the main Android system. Recovery mode can be useful when a phone is stuck in a bootloop or when it has been infected with ...
[citation needed] Another example of a hard brick was related to a EFI firmware bug which could allow users to run rm on the EFI system variables mounted to the filesystem from within the operating system, resulting in a bricked bootloader that would require ROM soldering tools to repair. This bug was addressed by Linux developers in 2016.
The booting process of Android devices starts at the power-on of the SoC (system on a chip) and ends at the visibility of the home screen, or special modes like recovery and fastboot. [ a ] The boot process of devices that run Android is influenced by the firmware design of the SoC manufacturers.
An unlocked bootloader, showing additional available options. Bootloader unlocking is the process of disabling the bootloader security that makes secure boot possible. It can make advanced customizations possible, such as installing custom firmware.