Apple posted strong results for its quarterly earnings on Thursday, but investors’ attention is also focused on the upcoming CEO change and the tech firm’s artificial intelligence strategy.

The January-March results announced Thursday reflect the continued momentum of iPhone sales. CEO Tim Cook said in a statement that it was the company’s best March quarter ever.

The company earned $29.58 billion, or $2.01 per share, in the January-March period, up about 22% from the same period a year earlier.

Revenue rose about 17% to $111.18 billion from $95.36 billion a year earlier. iPhone sales made up the bulk, bringing in $56.99 billion.