[gTen]

Thumb recognition is not gonna happen without some extension

Eye recognition won't either because it does not have enough focus on the lens.

Face recognition while I do not know if it exists for the phone IS possible without any additional hardware.


What do you want this for exactly?


Edit ----


JokeZony0u face recognition is not that hard..even cameras do it...the concept for face recognition is just isolate out the edges such as your nose, shape of face, location of eyes and match it..thus a picture would easily work.