It has been the hot thing to make kill switches for phones recently. Carriers have been asked by government agencies to do it, states are passing laws to require it, Apple did it, and now Google is implementing it in Android 5.0. Lollipop will come with an opt-in "Factory Reset Protection" option that keeps a thief from being able to wipe your phone, making it a less appealing target in the first place.

Android Lollipop Will Come With Factory Reset Protection That Makes Stolen Phones Useless was written by the awesome team at Android Police.