MCI Names Richard Roscitt President And Chief Operating Officer

ADC CEO and Former AT&T Senior Executive
Brings 30 Years of Telecommunications Experience to the Company ASHBURN, Va., August 13, 2003 - MCI (WCOEQ, MCWEQ) today announced the appointment of Richard R. Roscitt as its president and chief operating officer, reporting to chairman and CEO Michael Capellas. Roscitt brings more than 30 years of telecommunications experience to MCI, having served as chairman and CEO of ADC, president of AT&T Business Services and president and CEO of AT&T Solutions. Roscitt will oversee MCI's core operating units and will be based in the company's corporate headquarters in Ashburn, Va. "Rick is uniquely qualified for the position of president and COO and he will be a valuable addition to the MCI management team," said Capellas. "His experience is marked by a track record of success in creating business growth and technological innovation. I am confident that Rick's leadership, energy and telecom experience will serve MCI well as we emerge from Chapter 11. He knows our customers and our business and will immediately fit with MCI's new culture - one focused on customer service, innovation and integrity." Roscitt, who officially starts on September 1, 2003, is the most recent addition to MCI's new management team. Since Michael Capellas joined the company seven months ago, MCI has been actively rebuilding its management team and its board of directors. Roscitt joins the following newly-appointed MCI executives:

• Robert Blakely, EVP & Chief Financial Officer
• Anastasia Kelly, EVP & General Counsel
• Daniel Casaccia, EVP of Human Resources
• Grace Chen Trent, SVP & Chief of Staff

Roscitt most recently served as ADC's chairman and CEO since 2001. He has been credited with transforming ADC into a company focused on key product and service offerings for the broadband sector. Prior to joining ADC, Roscitt spent 28 years with AT&T, rising to President of AT&T Business Services, where he was responsible for all of the company's business markets operations, including AT&T Solutions, Business Services Sales, Business Services Operations, AT&T Data and Internet Services, and AT&T Global Network Services. "Having competed against MCI, I have a tremendous amount of respect for the company, its management team, its capabilities and the spirit and determination of its 55,000 employees," said Roscitt. "I've been impressed that customers continue to remain loyal to MCI, which speaks volumes about the company's unrelenting focus on quality of service, customer support and superior network performance. I have every confidence that MCI has a bright future and look forward to working with a group of people I have long admired in the marketplace." Roscitt is currently a member of the Board of Directors of the Telecommunications Industry Association (TIA), the leading U.S. nonprofit trade association representing the communications and information technology industries, and is a Member of the Associates Committee of the National Cable and Telecommunications Association (NCTA). He is a CEO member of The Technology Network (TechNet), a nationwide network of senior executives who work to build bipartisan support for policies that strengthen America's leadership in the New Economy. Additionally, he serves on the Board of Directors of Tell Me Networks, the Mountain View, Calif.-based voice recognition company. Roscitt received a Bachelor of Engineering Degree from Stevens Institute of Technology and earned an MBA in Management from the Sloan School of MIT. He is a member of the Board of Trustees of Stevens, one of the oldest and most admired Engineering and Science universities in the world. NOTE TO EDITORS: B-Roll Feed Information:

About WorldCom, Inc.
WorldCom, Inc. (WCOEQ, MCWEQ), which currently conducts business under the MCI brand name, is a leading global communications provider, delivering innovative, cost-effective, advanced communications connectivity to businesses, governments and consumers. With the industry's most expansive global IP backbone, based on the number of company-owned POPs, and wholly-owned data networks, WorldCom develops the converged communications products and services that are the foundation for commerce and communications in today's market. For more information, go to http://www.mci.com.