SymbianApps: Sonic Unlock : Unlock your Symbian phone with Voice on Nokia N8
Watch the demo video of the application working on N8.
you can download from here
This is a very cool application for Symbian devices and available for free at Nokia Store. You can record your voice and just utter those words to unlock your device from next time.
How to use it:
Record your command (such as “Unlock, baby”) for unlock.
Activate your phone lock.
Speak to your phone, certify your voice and access.