Apple shifted 47.8 million iPhones throughout the last three months of 2012, one million less than analysts had predicted.
The computer giant's shares fell 3% to $517 (£326) in extended trading after the release of the report.
More top news
An inventor who built a submarine has told police that a missing journalist died onboard in an accident, and that he buried her at sea.
Want to see the moon appear to take a "bite" out of the sun? Here's some tips on how to do it without damaging your eyes.
Rugby star Matt Dawson has revealed how he required heart surgery after developing Lyme disease from a tick bite.