Analysts believe forecasts will be missed as neophile consumers delay spending till October.
Apple consumers are the most loyal breed on the mobile market, but increasingly hot chatter of an iPhone 5 is slowing demand.
The next fiscals are due this week, and Wall Street is not getting too excited. Reuters reports that iPhone sales figures are set to drop in Q3 across Europe and China, the firm's two largest markets beyond its native US.
Apple is expected to report fiscal third-quarter earnings of $10.35 a share on revenue of $37.2 billion, according to Thomson Reuters I/B/E/S. And the analyst thinks Apple may miss the average sales forecast by about 0.2 per cent
It would be a case of history repeating itself, as iPhone sales dipped 17.1 per cent in Q3 2011 (ahead of the October 4S release) opening the door for Samsung to become the world's biggest smartphone maker.
However, WSJ analysts predict a bumper Q4 for Apple, should rumours of the iPhone 5 and iPad Mini prove to be true.