I'm not an engineer so I'm just guessing, but these radio processors must be one of the main power hogs after the LCD and CPU. As someone alluded to above, it's likely one of the more expensive parts as well. In other words, there's a lot of motivation for Apple to take this in-house. Reductions in power consumption and cost would offset new innovations such as the sapphire glass.
4/8/14 at 1:09am