The company has heavily advertised AI features since the latest iPhones were released in September.

Sales of Apple iPhones dropped the end of last year, as the tech firm's roll out of new artificial intelligence (AI) features was met with a lukewarm response. Chief executive Tim Cook said the new features helped to drive stronger sales in the countries where they were available,

Apple revealed quarterly results that slightly exceeded Wall Street expectations, but iPhone sales were flat on the previous year as the company battles rising competition from local device makers in China.