A product listing on Vodafone’s U.K. website has suggested that the iPhone 5 will arrive in both 16GB and 32GB capacities. AppleInsider reports that the product page for the Vodafone Sure Signal femtocell listed both white and black variants of 16GB and 32GB capacity iPhone 5 units alongside similar listings for all variants of the iPhone 4, iPhone 3GS, and iPhone 3G as compatible with the device. The listings have since been removed. Apple…