Here is the pin-out diagram drawing of Samsung Galaxy Watch Model SM-R800. Although all Samsung Products are coming with a USB cable connectivity with computers, so you can flash your device with firmware and reset it to factory setting. But unfortunately Samsung Watches doesn't not come with such ability. In most of these watches user need to connect the watch by a wireless connection. And it does need a computer with wireless connectivity. Well sometimes your wireless connection might break or your watch get bricked and you will have no way to connect your watch by a wireless connection.