Note: This article was written as a half-finished draft in 2019 for Samsung’s Tizen-based Galaxy Watches. Samsung now uses Google’s Wear OS platform.
Download ‘SDB Starter Kit’: https://forum.xda-developers.com/attachment.php?attachmentid=4338152&d=1511255266
Find the SDB binary for your platform, extract it to a folder, and open a CMD/Terminal in the directory
On the watch:
Go to Settings -> About watch -> Software and tap on “Software version” until you see “Developer mode turned on”
Go to Settings -> About watch -> Debugging -> Turn on
Go to Settings -> Connections -> Bluetooth -> Turn off
Go to Settings -> Connections -> WiFi -> Sign into the same network that your PC is connected to (if it’s in a loop of ‘Connecting’ and ‘Saved’, forget the network and log in again). Tap The network and scroll down to ‘IP Address’ and make a note of the IP
Turn off the watch (hold down home button) and then turn it back on
On the PC:
sdb shell (to allow Windows Firewall)
sdb connect 192.168.1.172:26101 (tap the checkmark on the watch, then run the command again to verify)
Write down the current sales code for later, in case you want to revert the watch to its original state, then press the watch’s home button
(BE VERY CAREFUL NOT TO ACCIDENTALLY TAP, BECAUSE IT WILL IMMEDIATELY RESET THE WATCH)
Scroll to the desired sales code (XAR is the one for the United States) and tap it
Set up the watch again.