[wired] Apple doesn’t want to let you inside your iPhone, even if all you want to do is fix it.
That’s what repair company iFixit claims, at least. The company recently discovered that Apple has quietly switched the screws in the latest shipments of the iPhone 4 from a basic Phillips head to a tamper-resistant screw that you can’t remove with any screwdriver you’d buy at a hardware store.
The screw in question is called a “Pentalobe”, a five-point head with a round shape resembling a daisy.
How Apple Is Screwing Your iPhone