Before you can set up Touch ID, you need to create a passcode for your device. Then follow these steps:
- Make sure that the Home button and your finger are clean and dry.
- Tap Settings > Touch ID & Passcode, then enter your passcode.
- Tap Add a Fingerprint and hold your device as you normally would when touching the Home button.
- Touch the Home button with your finger—but don't press. Hold it there until you feel a quick vibration, or until you're asked to lift your finger.