Apple will reveal the next iPhone at a special event on September 10, according to AllThingsD sources.
Speculation points to the iPhone 5 successor featuring an improved camera and a fingerprint sensor.
It has also been suggested that Apple intends to unveil the latest model alongside a lower-cost iPhone.
The Wall Street Journal claimed in January that Apple has been exploring a cheaper iPhone for years.
While it's thought that a lower-cost version of the popular phone would be similar in appearance to existing models, it may switch the current aluminium body for less expensive polycarbonate plastic housing.
Last month, Apple reported a second consecutive drop in quarterly profits despite a significant increase in iPhone sales.
During the three months ended June 29, iPhone sales came in at 31.2 million, compared to 26 million a year earlier.
Apple CEO Tim Cook said at the time: "We are really excited about the upcoming releases of iOS 7 and OS X Mavericks, and we are laser-focused and working hard on some amazing new products that we will introduce in the fall and across 2014."