The teardown was done by XDA Developers, who noticed Samsung had released the Galaxy Watch 3 Plugin app ahead of the product’s launch. By decoding the APK, XDA found several videos and images of new features including many of its watch faces.
Also found was a new way to take a screenshot (press both side buttons simultaneously) and a fall detection mode that Samsung may well have lifted from the Apple Watch, though Samsung’s version has parallels with its existing SOS mode.

If you fall and don’t respond to your beeping watch within a minute, the watch can send your GPS location and sound recording to your emergency contacts.
Samsung is very likely to officially launch the Galaxy Watch 3 at Unpacked on 5 August.