v4 - 1.2.1 (Linux) 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).

There is no account of Samsung ever having officially openly released Odin,[3] though it is mentioned in the developer documents for Samsung Knox SDK[4] and some documents even instruct users to use Odin.

The tool is not intended for end-users, but for Samsung's own personnel and approved repair centers.

[8] Although none of the publicly available downloads are authorized by Samsung itself, XDA-Developers consider the files offered on their Forum (Patched Odin v3 3.14.1 for windows) (Odin v4 1.2.1 for linux) the safest option.

For the usage of Odin, the phone needs to be in Download mode.