Virgin Mobile USA, LLC is a joint venture between Sir Richard Branson's Virgin Group, and Sprint, which operates the largest all-digital, all-PCS nationwide wireless network. Established in October 2001, Virgin Mobile is the first mobile virtual network operator (MVNO) in the United States and is the first U.S. company to create a step-down price plan with no contracts to sign and no fine print. Under the arrangement with Sprint, Virgin Mobile will utilize Sprint's wireless network to deliver service to its customers, while retaining all responsibility for customer service and subscriber maintenance.