Apple Inc, the world's largest technology company, is expected to present its redesigned iPhone in September, according to technology blog AllThingsD.
The company was not immediately available for comment.
Apple's iPhone launches are among the most-watched events on the tech industry calendar.
Reuters reported in June that Apple is exploring launching iPhones with bigger screens, as well as cheaper models in a range of colours, over the next year, according to several sources with knowledge of the matter.
The new iPhone would hit store shelves in time for the crucial holiday season.