Odin, is a very familiar tool among the Android modders, especially for those who have Samsung devices. Many folks are not aware, actually Odin is Samsung’s official tool designed for technicians, but now this tool has been spread out freely on the internet and anyone can use it without charge.
The main functionality of this tool is to perform flash a firmware (both official or the custom firmware) onto Samsung devices, even in many cases we are able to utilize Odin to fix bricked devices, so it can work normally again. Odin is known to flash ROM that has the following extension bin, tar, md5, smd, gz and tgz. But the most used firmware file is *.tar.md5 file.
Before using Odin make sure your device has been recognized by windows, to get that you should already have the most recent Samsung device drivers installed on your computer. Try to take a look at Windows Device manager, lookup your device in the list of hardware.
Currently Odin has reached version 3.xx and latest stable version is v3.10.3 that can work with the latest Samsung devices such as the Galaxy Note 2, Galaxy S3 or the new Galaxy S4. In case you encounter problems when using the latest version, try to use a previous version.