Foxconn: iPhone 5 is "most difficult" device we've ever assembled

Apple is facing a manufacturing shortage that's affecting the inventory of its new iPhone 5. Delivery times have slipped to 3-4 weeks and analysts are lowering their sales estimates for the holiday quarter. Foxconn, the Taiwanese company that assembles the iPhone for Apple, told the Wall Street Journal that the iPhone 5 is slow off the assembly line because of difficulties in assembling the device.

An anonymous company official told the Wall Street Journal that, "the iPhone 5 is the most difficult device that Foxconn has ever assembled." It's light, thin and its "design is very complicated." Though the company's production is slower than it wants, Foxconn expects that its output will increase as the company streamlines its production lines. The unnamed Foxconn official said that "it takes time to learn how to make this new device" and added that the company's "productivity has been improving day by day."