The phone can be programmed to recognize the user's distinct fingerprint.
This is a feature that Apple is eager to show off, but how will they do that in stores where hundreds of people come in and out to test out the same machines day after day?
The answer is a demo application Apple has designed specific to the iPhone 5S demo units that will be found in Apple Stores and Carrier stores, 9to5Mac reports.
Here's how it will work, according to 9to5Mac:
To test Touch ID, a customer can launch the demo app. In this app, a customer can setup the device to recognize a single fingerprint. When the setup process is complete, the application will direct the user to place that fingerprint on the Touch ID sensor on the Home button. The application will then show that the Home button successfully read the fingerprint. Then, the app will tell the user to place a different finger on the Home button. The app will then show a red fingerprint outline to note that the authentication was not successful.
This will help potential buyers understand the setup process of Touch ID, and how it will work to accept or reject