Using on-screen prompts as a guide, swipe a finger downward over the Home button (oval button located below the display) 10 times.
Fingerprint recognition rate is highest with finger at a 90 degree angle (swipe screen straight to ensure highest accuracy).
Tap Done (located on the bottom).
From the Create password prompt, enter a password (4 to 16 characters) to use as an alternative to your fingerprint then tap Continue.
From the Confirm password prompt, re-enter the password then tap OK.