Use haptics to offer cues and signal confirmation to the phone unlock screen.
Whether a user employs face recognition, passcode, or pattern to unlock their screen, haptics can add more to the experience with tactile cues. For example, haptics can be used to confirm the pattern entry as it is being entered. Different pressure levels (light touch vs. pressing) can be incorporated to increase the number of lock combinations. Effects can be used to indicate whether any type of passcode has been accepted or rejected. With informative haptics cues, the user knows that the system is working as expected.