Tony Melone was recently promoted to CTO of Verizon Communications (NYSE:VZ), but before that he was the chief architect of Verizon Wireless' LTE buildout. The company's LTE plans are continuing apace, with the impending launch of Verizon's first LTE smartphone, the HTC ThunderBolt. At the Mobile World Congress conference in Barcelona, Spain, last month, Melone sat down with FierceWireless Editor-in-Chief Sue Marek to talk about Voice over LTE technology, IMS, whether and how Verizon will deploy CDMA 1X Advanced, and the importance of policy control in an LTE network. Hot Seat