IPhone Air Sales: Why They’re Underperforming

Jason Purdy wanted to like his new iPhone Air.

Raised in Apple’s AAPL -0.48%decrease; red down pointing triangle hometown of Cupertino, Calif., and later an Apple senior product manager, Purdy said he loves to see innovative product design from tech companies. So he made an Apple store appointment to buy the new, ultrathin smartphone the day it went on sale.