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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 .
The Android Debug Bridge (commonly abbreviated as adb) is a programming tool used for the debugging of Android-based devices. The daemon on the Android device connects with the server on the host PC over USB or TCP , which connects to the client that is used by the end-user over TCP.
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.
On Samsung devices, (excluding the Nexus S and Galaxy Nexus devices), power, volume down and home has to be pressed for entering ODIN mode. This is a proprietary protocol, and tool, as an alternative to fastboot.
On Samsung smartphones, the Samsung Secure Boot Key (SSBK) is used by the boot ROM to verify the next stages. [5] On SoCs from Qualcomm, it is possible to enter the Qualcomm Emergency Download Mode from the primary bootloader. If the verification of the secondary bootloader fails, it will enter EDL. [6] [better source needed]
The Android Debug Bridge (ADB) is a tool to run commands on a connected Android device. Fastboot is a protocol used for flashing filesystems. Code written in C / C++ can be compiled to ARM , or x86 native code (or their 64-bit variants) using the Android Native Development Kit (NDK).
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.
Android SDK. The Android SDK is a software development kit for the Android software ecosystem that includes a comprehensive set of development tools. [2] [3] These include a debugger, libraries, a handset emulator based on QEMU, documentation, sample code, and tutorials.