One of the main reasons the i phone 5 S was created was for better improvements and a touch id. all you have to do to unlock things is use your thumb print. you can do any finger you want and a limited number of 3 or 4. There are many layers of glass to try and do the best it can to make sure it doesn't crack if you drop your phone.as you put your finger on it it will slowly scan your finger. then that makes it unlock without using the password.