0001193125-07-229441 Sample Contracts

TWELFTH SUPPLEMENTAL INDENTURE Dated as of October 30, 2007

Twelfth Supplemental Indenture • October 30th, 2007 • America Movil Sab De Cv/ • Telephone communications (no radiotelephone) • New York

• Contract Type
  Twelfth Supplemental Indenture
• Filed
  October 30th, 2007
• Company
  America Movil Sab De Cv/
• Industry
  Telephone communications (no radiotelephone)
• Jurisdiction
  New York

TWELFTH SUPPLEMENTAL INDENTURE, dated as of October 30, 2007, among América Móvil, S.A.B. de C.V., a sociedad anónima bursátil de capital variable organized and existing under the laws of the United Mexican States (“Mexico”) (herein called the “Company”), having its principal office at Lago Alberto 366, Edificio Telcel I, Piso 2, Colonia Anáhuac, 11320, Mexico, D.F., Mexico, Radiomóvil Dipsa, S.A. de C.V., a sociedad anónima de capital variable organized and existing under the laws of Mexico (herein called the “Guarantor”), having its principal office at Lago Alberto 366, Edificio Telcel I, Piso 2, Colonia Anáhuac, 11320, Mexico, D.F., Mexico, and The Bank of New York (as successor to JPMorgan Chase Bank, N.A.), a banking corporation duly organized and existing under the laws of the State of New York, as Trustee (herein called the “Trustee”), to the Indenture, dated as of March 9, 2004, (as supplemented by the Fifth Supplemental Indenture, dated as of December 14, 2004, and the Eighth

ELEVENTH SUPPLEMENTAL INDENTURE Dated as of October 30, 2007

Eleventh Supplemental Indenture • October 30th, 2007 • America Movil Sab De Cv/ • Telephone communications (no radiotelephone) • New York

• Contract Type
  Eleventh Supplemental Indenture
• Filed
  October 30th, 2007
• Company
  America Movil Sab De Cv/
• Industry
  Telephone communications (no radiotelephone)
• Jurisdiction
  New York

ELEVENTH SUPPLEMENTAL INDENTURE, dated as of October 30, 2007, among América Móvil, S.A.B. de C.V., a sociedad anónima bursátil de capital variable organized and existing under the laws of the United Mexican States (“Mexico”) (herein called the “Company”), having its principal office at Lago Alberto 366, Edificio Telcel I, Piso 2, Colonia Anáhuac, 11320, Mexico, D.F., Mexico, Radiomóvil Dipsa, S.A. de C.V., a sociedad anónima de capital variable organized and existing under the laws of Mexico (herein called the “Guarantor”), having its principal office at Lago Alberto 366, Edificio Telcel I, Piso 2, Colonia Anáhuac, 11320, Mexico, D.F., Mexico, and The Bank of New York (as successor to JPMorgan Chase Bank, N.A.), a banking corporation duly organized and existing under the laws of the State of New York, as Trustee (herein called the “Trustee”), to the Indenture, dated as of March 9, 2004, (as supplemented by the Fifth Supplemental Indenture, dated as of December 14, 2004, and the Eighth