Ryuji Yamada, chief executive officer and president of Japan’s largest operator, has told Mobile World Live of NTT DoCoMo’s strategy for migrating its 3G customers to faster LTE services. In an exclusive interview, Yamada cites three main areas of focus: firstly, it will expand its lineup of LTE-enabled devices this year; secondly, DoCoMo will offer “attractive LTE billing plans,” including free voice services; and thirdly, it will increase network capex.