Unbrick Samsung Gear S2 Classic Reboot loop stack in reboot Can’t install

By this method you will be able to put your watch into download mode and install firmwares by wires that you will need to solder inside your watch.
In case your watch keeps rebooting over and over and then dies, or you can’t connect over wifi/bluetooth connection or you had an update and crashed your watch,  so here is the method used to fix that problem.