Having offered the iPhone 4 and 4S for almost a year, carrier Virgin Mobile will begin selling the iPhone 5 starting June 28. It’ll offer the 16GB model for $550, the 32GB model at $650, and the 64GB model at $750; these prices represent a $100 savings over the standard, unsubsidized costs. Virgin Mobile’s monthly plans start at $30 a month, and offer unlimited messaging and data.