Among the key new features in Ice Cream Sandwich and the Galaxy Nexus is Face
Unlock, which uses facial recognition to unlock  the phone using the front facing camera, though it does need to be calibrated and can be thrown off by extreme lighting in practice, as evidenced by last night's failed demo during the launch event in Hong
Unlock, which uses
facial recognition to
unlock  the phone using the front facing camera, though it does need to be calibrated and can be thrown off by extreme lighting in practice, as evidenced by last night's failed demo during the launch event in Hong
unlock  the phone using the front facing camera, though it does need to be calibrated and can be thrown off by extreme lighting in practice, as evidenced by last night's
failed demo during the launch event in Hong Kong.
If you are near a light source, it is easy to use
facial recognition or the iris scanner (if you do not wear glasses) to
unlock your device — if all else
fails, you can always type in a pin number.