If you lose your roomkey, someone can go unlock your room....?But, if you forgot your phone somewhere, someone can just pick it up and unlock everything of yours. That is where I am kind of not comfortable about...
On the other hand, if they need us to put in the password on the phone to activate the unlock feature, then what is the point of having this other than combining all the other keys?
Thats why they don't print the room numbers on them...
Just don't scratch your room number on the case of your phone. And leave it locked.