1. Find "Touch ID"
2. Add fingerprint
Follow the instructions on the display to add a fingerprint.
3. Select settings for Touch ID
Press the indicator next to "iPhone Unlock" until the function is activated.
Press the indicator next to "iTunes & App Store" until the function is activated.
4. Return to the Home screen
5. Use Touch ID
Press and hold the Home key.
Touch the Home key to scan your fingerprint.