Reported by: Nicholas Mihailov
One of the most advertised new feature of the Android 4.0 platform is the Facial recognition technology which can now be used for unlocking your phone.
In the latest upgrade of the OS, there are additional features to make the recognition simpler and faster.
To do this simply go to Settings > Security > Improve face matching. By doing this you can have improved speed and accuracy. Another tip would be to have different angles of your face for greater accuracy.