Apple has reported the slowest growth in iPhone sales since the product's 2007 launch and warned sales will fall for the first time later this year.
The US tech giant sold 74.8 million iPhones in its fiscal first quarter, compared with 74.5 million a year ago.
Apple reports say revenue for the next quarter would be between $50billion and $53billion, below the $58billion it reported for the same period a year ago.
Despite first-quarter iPhone sales being below the 75 million expected by analysts, it was still a record quarter for the company.
Apple revenue in the three months to 26 December was $75.9billion and net profit was $18.4billion, both of which the highest ever recorded by the company.
Sales of iPhones accounted for 68% of the company's revenue in the period.