When Apple began selling the iPhone 5 on September 21, it quickly became the fastest-selling iPhone to date, with five million units sold in the first three days. However, sales have started to slow down since then, and they’ve begun falling short of analyst expectations.
It’s not that customers aren’t buying it, or that the iPhone 5 isn’t successful. The reason it’s not meeting expectations is because Apple’s manufacturing partner, Foxconn, simply can’t make it fast enough. Its design is so complicated that it’s the most difficult device Foxconn has ever built.