Apple has warned iPhone sales are expected to fall for the first time since the smartphone’s launch in 2007 – sparking a drop in its share price.
The tech firm made the gloomy prediction after reporting the slowest ever sales growth for the iPhone for the final three months of last year.
It sold 74.8 million in the quarter – a record, but only slightly higher than the 74.5 million sold the same time the previous year.
But Apple said it expects to see the first ever decline in iPhone sales in the current quarter, compared to the three months of blockbuster sales at the start of 2015.
“We do think that iPhone units will decline in the quarter,” Apple chief executive Tim Cook said.
The announcement was followed by a decline of nearly 7% in its share price on Wednesday.
It comes after years of rocketing growth for the market-leading iPhone, which drives two-thirds of Apple’s revenue.
The slowdown is largely in line with expectations that sales of iPhones had peaked and Apple needs to find a new source of growth.
But Mr Cook said the firm still planned to keep investing in smartphones.
“There are still a lot of people in the world who will buy smartphones and we ought to be able to win over our fair share of those,” he said.
Despite the iPhone faltering, Apple still managed to post the largest single quarter profit in US corporate history.
Its net profits last quarter were $18.4bn (£12.8bn), up 2% on the same period in 2014.
Revenue was also at an all-time high of $75.9bn (£52.9bn) – though lower than forecast by analysts.
Mr Cook said: “Our team delivered Apple’s biggest quarter ever, thanks to the world’s most innovative products and all-time record sales of iPhone, Apple Watch and Apple TV.”
But the California-based firm also confirmed rumours it is expecting its revenue for the next quarter to decline.
It suggested revenue could be between $50bn and $53bn (£34.8bn and £36.9bn) – down from $58bn (£40.4bn) the same time last year.
It would be the first fall in revenue for Apple in 13 years.
Finance director Luca Maestri attributed Apple’s relatively lacklustre revenue to the strength of the US dollar, which he said knocked about $5bn (£3.5bn) off the total figure.
He also said Apple was beginning to see “signs of economic softness” in China, particularly Hong Kong.
For the last quarter, revenue in “Greater China” was up 14%, but weaker in the Americas, its biggest market, and Japan.
One retail expert said Apple must come up with “revolutionary products” this year if it is to avoid further damage to its growth.
Neil Saunders, chief executive of retail experts Conlumino, said: “While Apple engineers may be excited about shaving a millimetre off the depth of a phone, such technicalities are far less appealing to everyday users.
“The fact remains that 2016 is year when Apple needs to come up with revolutionary rather than evolutionary product. If it fails to do so, its growth is likely to be diminished still further.”