The report comes from the Taiwanese publication DigiTimes, which quoted Chinese-language site Commercial Times.
DigiTimes reports that trial production of the new smartphone will begin in December with an initial volume between 50,000 and 100,000 units.
“Facing low yield rates in the production of iPhone 5, Apple has accelerated the certification processes for related parts and components for the iPhone 5S,” Digitimes claims.
The iPhone 5S is expected to enter mass production in the first quarter of 2013.
According to the report, a new version of the iPad and the long-rumored Apple HDTV (iTV) will be released in Q3 next year.