Odin (firmware flashing software)

Although none of the publicly available downloads are authorized by Samsung itself, XDA-Developers consider the files offered on their Forum the safest option. For the usage of Odin, the phone needs to be in Download mode. For this, some key combination need to be pressed, such as Power + Volume Down + Home, or Power + Volume Down + Bixby, or connect to a computer while performing the Volume Up + Volume Down key combination. In 2026, Samsung started requiring to enable the Maintenance mode in the system settings before it is possible to access download mode. The thor protocol that Odin implements is used in many Samsung devices, including in some devices co-developed by Google and Samsung like the Galaxy Nexus. There is also an implementation of the thor protocol in Das U-Boot. == Heimdall ==

Heimdall is a free/libre/open-source, cross-platform replacement for Odin which is based on libusb. The name Heimdall, like Odin, is an allusion to Norse mythology; both Odin and Heimdall are among the deities of the Norse pantheon. It can be used either through the command line or with its graphical user interface. == References ==