This article will show you how to reset a Samsung Galaxy Watch 4. It will cover multiple methods for both types of resets: factory reset and soft reset (they are not the same!).
How to Perform a HARD RESET on Your Samsung Galaxy Watch 4 – If You Can't Access Your Watch
Below are two methods to trigger a factory reset on your watch. The first uses your phone via the Galaxy Wearable app; the other is done entirely on the watch.
You need to connect your Galaxy Watch 4 to your phone and it needs to be close enough to your phone to exchange information via Bluetooth. Here’s what you need to do:
Place the watch near your phone and make sure the watch is turned on and connected to the phone via Bluetooth.