White iPhones Won't Be Available Until Mid July
According to Apple’s official statement, you won’t get any white iPhones until the second half of July as they have proven more difficult to make than it was expected. The availability of the black models, which are found to be more popular, will not be affected.
Strange as it might seem, producing white equipment is indeed more challenging than the black one. The reason for it is the fact that making the black back of the glass requires an electroplating process, which creates a smooth look. Consequently, to make the back of the glass white you have to paint the case, which makes it quite challenging to create a smooth opaque surface. If the paint goes on too thick, it could be rather difficult to glue the glass on, as the glue might stick to the paint and it’s possible that in the course of time the paint will peel off the glass.