Chinese site EXPreview has posted images of what is claimed to be iPhone 5S production units.
The report also details the hardware features that will include IGZO (indium gallium zinc oxide) technology for its Retina display.
Apple will also switch from the three core PowerVR SGX543MP3 GPU to a quad-core PowerVR SGX 554MP4.
Fans of the smartphone can also expect NFC technology, 2 GB of RAM and support for 4G LTE-Advance networking.
Recent reports have claimed that Apple may push back the launch of its next iPhone due to changes in the screen size or issues in the integration of the fingerprint scanner.