Redundancy of supply. It would be insane for Apple's supply chain to be halted because the supplier of one part failed to deliver for whatever reason. Nearly ev

Redundancy of supply. It would be insane for Apple's supply chain to be halted because the supplier of one part failed to deliver for whatever reason. Nearly every major and minor component in an iPhone would be second-sourced, else they'd need to accumulate a month's supply of that part in a warehouse... http://en.wikipedia.org/wiki/Second_source http://en.wikipedia.org/wiki/Second_source It's the same reason MacBooks can ship with displays from either Samsung or LG, with SSDs from either Samsung or Toshiba. It's pretty much a lottery, and you won't know which till you run About This Mac.