The first one discovered by the Hemanth Joseph, a security researcher from India.
But now the researchers have discovered two vulnerabilities in the mechanism of iPhone and iPad that allows its deactivation.
One impacts devices running iOS 10.1 and another on the most current version of the software, iOS 10.1.1.

The first one discovered by an Indian security researcher.
The activation lock is activated automatically when the Find My iPhone is turned on.

