PassDial Pro cydia tweak allows you to specify passwords (other than your unlock one) that instead of unlocking the device, call a specific number or facetime a specific number/email.
It can hold 10 phone numbers, 10 facetime emails/numbers, and one password for each one. If you are using Simple Passcode (4 digit password), than your PassDial Pro passwords MUST be 4 digits.
NOTE: If you are using a PassDial Pro passcode that is longer than 4 digits, than the password to unlock your device must not be a Simple Passcode (if you do not know what this is, then you should probably stick to 4 numbers).
Configure options from Settings.
You must enable it yourself.