The good folks at iFixit have noticed that iPhone 4s taken in for service often return without their original Phillips 00 screws. Instead, they're being replaced with Apple's own proprietary Pentalobular screws. These are the same screws that are in the current-generation MacBook Air.
Don't call them Torx screws because they most certainly are not. To get the rare, expensive tool that's meant to extract them, you'll have to be a certified Apple tech (or know one).
While you're meant to use a special driver to extract those screws, you can get them out with something else. That something else is a part of iFixit's "
