The demo presented on the Internet which shows how you can easily unlock any Android 4.0 device confirms the users fears who said that the feature is not secure.
The person who created the video below shows step by step how Galaxy Nexus ( Android 4.0 ) can be unlocked without problems with the use of a simple photo.
In theory, Face Unlock should unlock the phone just after it scanned the face of the device owner. In the video you will see that the “hacker” repeats the operation to confirm the unlocking of the Galaxy Nexus with the help of a photo displayed on another device.
In other words, the so called locking / unlocking patterns are more secure than the Face Unlock feature.
Let’s take a look at the video