Key Takeaways More iPhones were upgraded during Apple’s fiscal first quarter than any previous period, CEO Tim Cook said on the company's earnings call Thursday. The milestone comes as Apple expands the availability of its AI features,

Apple's latest iPhones are flying off the shelves in some markets, and not in others. Apple CEO Tim Cook says this all comes down to where Apple Intelligence is available, and where it isn't.

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