Apple appears to be prepping its next-generation iPhone with a fingerprint sensor.

Developer Hamza Sood tweeted the news on Monday, revealing that iOS 7 beta 4 includes a fingerprint sensor on the home button.

Sood posted a screenshot of the new "BiometricKitUI" folder, which contains code meant for users who've enabled iOS VoiceOver. The text inside indicates that a biometric sensor will be embedded into the phone's Home button.

According to an unnamed 9to5Mac source, the user interface for the fingerprint scanning system is complete; the technology is reportedly intended to help unlock the phone. It is unclear, however, whether the function will also be used for a rumored Apple payment system or be integrated into Passbook or other built-in apps.

Apple did not immediately respond to a request for comment.

Source: PC Magazine