AllThingsD has reported that Apple will unveil the iPhone 5s at a media event on 10 September 2013 (which we had guessed earlier). It is unclear if Apple will announce the rumoured low cost iPhone now dubbed the iPhone 5c at this event.
Apple's upcoming iPhone 5S is expected to feature a design that is similar to the iPhone 5, but with a number of improvements. It is rumored to include a fingerprint sensor, an upgraded 12-megapixel camera with a dual-LED flash, and iOS 7. It is likely that iOS 7 will become publicly available after the announcement or when the phone debuts.
Parts for the iPhone 5s have been showing up online which is expected before a new product launch.