iPhone 5S release date is coming soon and more features are hinted by the newly released fourth beta version of iOS 7.

iOS 7 beta 4 gave some clues on the possible features that will come on the imminent iPhone 5S release date such as the fingerprint sensor, A7 chip processor as well as an improved Siri.

The fourth beta version of iOS 7 is currently available for developers should contain more bug fixes, graphics and UI enhancements, and a couple of other updates.

The latest beta version of iOS 7 hinted that the new iPhones will include a fingerprint sensor as BiometricKitUI code bundle is found in the latest beta version of iOS 7. Moreover, it includes strings on how to use a fingerprint sensor on an iPhone.

Developer Hamza Sood discovered the intriguing code in beta 4's 'BioMetricKitUI' folder that confirmed the rumours that the next iPhone will include a fingerprint scanning technology.

The strings of code Sood discovered referred to a "photo of a person holding an iPhone in their right hand while touching the Home Button". The photo also noted that a fingerprint that changes colour during the setup process.

Another feature that confirmed by iOS 7 Beta 4 is the quad core A7 chip processor. The iPhone 5S is believed to use the new Apple A7 processor. Rumour has it that the processors are manufactured by Taiwan Semiconductor Manufacturing Company.

Nick Frey told 9to5Mac that consumers should expect an A7 processor at the iPhone 5S release date based on his analysis.

Lastly, the next full-fledged iPhone will also include an improved Siri. The iOS 7 Beta 4 includes development versions of new male and female Siri voices for U.S. English and French, and a male voice for German.

According to reports, iOS 7 beta 4 is already available for developers through Apple's developer site since July 29. The report added that the company is planning to release two more beta versions of iOS 7 before it will release the Gold Master or the official version of the iOS 7.

If rumours proved to be true, it is more likely that consumers will see an iPhone 5S release date around mid or late September.

iPhone 5S release date will be soon and is expected to come with A7 quad core chip; Near Field Communication; 13MP back camera; up to 128GB internal storage and longer battery life.

However, Apple still has to confirm the iPhone 5S release date as well as its specs and features.