You know the Activation Lock feature Apple introduced in iOS 7? Now, it’s enabled by default in iOS 8. Activation Lock is Apple’s version of the kill switch. It means you can lock and secure your iPhone remotely if it gets stolen, meaning you turn it into a brick so no one else but you or those who have the password can unlock it. Users are the only one who can enable the kill switch. Mobile carriers, Apple, and law enforcement agencies don’t have access to the system so it guarantees as much security as it can. Of course, you can opt out of this as well. But with smartphone theft pretty rampant, what’s an extra layer of support?
Source: PCWorld