Here is some proof that  Apple Inc. (NASDAQ:AAPL)’s iPhone 6 and iPhone 5S will feature fingerprint sensors. It was recently discovered that iOS 7 beta 4 will include BiometricKitUI code bundled. It also includes strings for a tutorial on how to use the fingerprint sensor on the iPhone.

Apple iPhone 6, 5S

Apple’s iPhone 5S and iPhone 6 Leaked photos show fingerprint technology

The string displays an image of someone holding the iPhone with their left hand, and touching the home button with their thumb. There is also a similar photo of someone doing the same with their right hand. Interestingly enough, there is also another photo of a fingerprint that changes color all during the set-up process. There have been numerous rumors that the iPhone 5S would feature fingerprint technology. And just last month, there was a filed patent showing a fingerprint scanner on the phone’s bezel.

Apple Inc. (NASDAQ:AAPL) explained, “By encasing both the bezel and the sensor die in the encapsulation structure, the elements may be brought closer together than otherwise possible. In addition, the encapsulation structure physically protects the bezel and sensor die, and in particular maintains the spacing there between in a fashion that isn’t possible by currently known device designs.”

Apple fans eagerly await the new fingerprint sensor

Apple Inc. (NASDAQ:AAPL) also posted a job for a software engineer in Melbourne, Florida. This is the same city where Apple Inc. (NASDAQ:AAPL) has a design center and AuthenTec’s headquarters are located. The latter was acquired by the Cupertino-based company a year ago.

iOS 7 and iPhone 5S will likely debut sometime in the fall. The iPhone 6, which is expected to be a more advanced and updated smartphone, will likely debut sometime next year. A fingerprint sensor could prove to give the company a much needed boost and increase consumer interest. Although most Apple Inc. (NASDAQ:AAPL) fans have been patient enough to wait for the next big thing from the tech giant, interest in Samsung’s Galaxy line continues to grow.