Well, this is new.
Today, Google quietly announced a new version of Android in a small blog post.
rig Protection will allow a user to remotely lock their rig if it gets lost or stolen.
This will prevent your phone from being used until you get in with your Google account.
This protection even remains in place if the person who takes your phone performs a factory reset.
Android 5.1: Unwrapping a new Lollipop update| Official Android Blog
