UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of March, 2024. Commission File Number: 001-38763 MILLICOM INTERNATIONAL CELLULAR S.A. (Exact Name of Registrant as Specified in Its Charter) 2, Rue du Fort Bourbon, L-1249 Luxembourg Grand Duchy of Luxembourg (Address of principal executive office) Indicate by check mark whether the registrant files or will f ...