It worked.. I turn off the Location, Switched it off & Restarted Note9 after 10minutes without Location Enabled but it works in same way Connected to Home WiFi even when Location was Disabled... So I also done some home work that how actually it works.. First for few days it observed our working pattern (Frequency on Same WiFi networks) on WiFi before implementing it...Then it might detects our Favourite WiFi places by their unique Mac address (Ssid/BSsid) of the AP (Access Point) and when it is in the range of that geo fancing area it got Automatically Enable.... https://support.samsungknox.com/hc/en-us/articles/115013247807-Adaptive-Wi-Fi
￼ Auto Wi-Fi uses geofencing (a virtual geological fence based on cellular stations) to detect a user's location. In registered geofenced areas, “ENTER” and “EXIT” events will be triggered based on location changes detected via the user's device. Since Auto Wi-Fi is only triggered when these events take place, the device does not have to constantly scan for location, thereby saving battery life. Samsung’s original cell-based geofencing technique allows users to use Auto Wi-Fi without turning GPS on. Samsung’s geofencing technique also incorporates learning algorithms which improves location accuracy over time as users continue to use it.