The iPhone 4 is currently in extremely scarce supply in the UK, the Telegraph reports. Out of several carriers, only O2 is said to have any units still in retail shops. None of the companies are selling units online, though Vodafone has set up a back-order process through which people can have phones delivered as soon as new ones come in. A recent resupply shipment was entirely consumed by back-order customers, a Vodafone spokesman notes.
