This cannot be done by somebody who has taken your phone.
Sign in with your Kingdom membership, so the alert carries your name and number.
Fire, flood, a gun in the street. The Kingdom can wake this phone when something is happening where you are — even locked, even in your pocket. Those seconds are the ones in which somebody gets inside, gets uphill, gets away.
So it opens with one tap, without a browser, and without ever having to find it again.