When Movistar, a mobile phone provider with 15.7 million customers in Argentina, was formed by the merger of Movicom and Unifón, the company needed to consolidate two IT infrastructures into a single data center. However, Movistar could not accommodate both physical environments in its data center without exceeding its power, cooling, and space capacity. Movistar needed to reduce the size and cost of its physical IT infrastructure while providing the IT performance the company needed to grow and maintain its industry leadership. Movistar used Microsoft Virtual Server 2005 R2 and Windows Server 2008 Hyper-V technology to manage the virtualization of 50 physical servers running its important business applications. With Hyper-V, Movistar consolidated its data center, decreased the number of physical servers it needed, reduced its energy costs, and increased its business agility.