During the Morgan Stanley Technology, Media and Telecom conference on Tuesday, Verizon CFO Fran Shammo confirmed that Verizon will be moving to tiered data plans as early as this summer. Speaking about the unlimited data plan available with the iPhone 4, Shammo said, "Everyone knows that isn't long-term. We will move to tiered pricing in the mid-summer time frame." The iPhone 4 was launched with a $30 monthly plan that included unlimited smartphone data. The company previously offered a $15/150 MB plan that appealed to some customers, but this plan was removed when the iPho