Engadget: Choices, choices. Do you get the 16GB or 32GB iPhone 4? The black one now or the white one a little later? We can't tell you which variant of Apple's next phone will hold its value best over the coming months, but we can try to clear up a bit of the fogginess surrounding price plans on offer from UK networks. Orange and O2 are the first to drop handset pricing and full contract details, but they haven't made it easy for the discerning buyer, with each carrier offering more than a dozen options.