im surprised nobody has noticed this yet. you know how you take off the back cover(glass) on the 4 and 4s? you have to take out the screws on the bottom of the phone.
Why does the new part have these screw holes if the back is not removable. Thats why i think this is fake.
What? you serious? How else are you going to repair the phone? cause the back is removable from the front!