MILLICOM LAUNCHES GSM SERVICES IN PARAGUAY New York, Stockholm, London and Luxembourg - July 1, 2004 - Millicom International Cellular S.A. ("Millicom") (Nasdaq Stock Market: MICC, Stockholmsbörsen: MIC), today announces that Telecel S.A., its operation in Paraguay, has launched GSM services in the 850MHz frequency, covering 95 cities, under the brand name of Tigo. Telecel is committed to providing the most advanced technology and most useful services at the best price and its customers will now benefit from service enhancements including internet access through the GPRS platform and MMS (Multimedia Message Services). Telecel will continue to operate its TDMA cellular services alongside the GSM offering. Marc Beuls, President and Chief Executive Officer of Millicom International Cellular commented: "This migration to GSM services will provide Telecel with further opportunities to strengthen its competitive position in Paraguay and will create further operational synergies for Millicom when similar services are launched under the Tigo brand by our operations in Guatemala, El Salvador and Honduras in the coming months." Millicom International Cellular S.A. is a global telecommunications investor with cellular operations in Asia, Latin America and Africa. It currently has a total of 16 cellular operations and licenses in 15 countries. The Group's cellular operations have a combined population under license of approximately 387 million people. This press release may contain certain "forward-looking statements" with respect to Millicom's expectations and plans, strategy, management's objectives, future performance, costs, revenues, earnings and other trend information. It is important to note that Millicom's actual results in the future could differ materially from those anticipated in forward-looking statements depending on various important factors. Please refer to the documents that Millicom has filed with the U.S. Securities and Exchange Commission under the U.S. Securities Exchange Act of 1934, as amended, including Millicom's most recent annual report on Form 20-F, for a discussion of certain of these factors. All forward-looking statements in this press release are based on information available to Millicom on the date hereof. All written or oral forward-looking statements attributable to Millicom International Cellular S.A., any Millicom International Cellular S.A members or persons acting on Millicom's behalf are expressly qualified in their entirety by the factors referred to above. Millicom does not intend to update these forward-looking statements. CONTACTS: Marc Beuls President and Chief Executive Officer Millicom International Cellular S.A., Luxembourg Telephone: +352 27 759 327 Andrew Best Investor Relations Telephone: +44 20 7321 5022 Visit our web site at: ------------------------------------------------------------ This information was brought to you by Waymaker The following files are available for download:

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Millicom International Cellular S.A. is a global telecommunications group with mobile telephony operations in 14 countries in Latin America, Africa and Asia. It also operates cable and broadband businesses in five countries in Central America. The Group’s mobile operations have a combined population under license of approximately 267 million people.


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