Apple’s iPhone sales fell in the all-important December quarter, a sign that its artificial-intelligence software has yet to kick off a new cycle of growth for its most valuable product.On Thursday, Apple reported that iPhone sales for the quarter were down nearly 1% from the prior year to $69.

The tech giant’s sales of apps and services helped profit grow 7 percent from a year ago, even as the company contended with slumping sales in China.

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.