EXECUTION VERSION FIRST AMENDMENT dated as of April 7, 2004 (this "Amendment"), to the Stock Purchase Agreement dated as of March 12, 2004 (the "Purchase Agreement"), by and among Telefonos de Mexico, S.A. de C.V., a Mexican sociedad anonima de...Stock Purchase Agreement • April 23rd, 2004 • Mci Inc • Telephone communications (no radiotelephone) • New York
