FingerPrint : an app to lock-unlock your n97. This is more of an fun app and not security oriented but i guess it can be used for security purposes as well, if configured properly.
When the FingerPrint screen pops up, you need to touch your finger to the screen to be “scanned” for your identity, there will be vibration and beep sounds during the scan. The phone will be unlocked not depend on whose finger it is, but on how many beeps or vibrations since your finger touch the screen 
