To automatically download software updates over a Wi-Fi network, tap the switch next to "Auto download over Wi-Fi."
Note: This option is not available on the Galaxy Watch4 and Galaxy Watch4 Classic.
While the software update is being applied, the watch will reboot and show a progress bar or rotating animation.
You can also update a Galaxy Watch4 directly from the watch. It will still need to be paired to a compatible Android phone. Just open Settings, scroll down to and then tap Software update.