NOTICE OF FOURTH QUARTER 2011 RESULTS AND CONFERENCE CALL

NOTICE OF FOURTH QUARTER 2011 RESULTS AND CONFERENCE CALL

Stockholm, February 1, 2012 – Millicom International Cellular S.A. (“Millicom”)
(Stockholmsbörsen: MIC) will announce its financial results for the fourth
quarter of 2011 on Wednesday, 8 February 2012 at 8.00 AM (Stockholm) / 7.00 AM
(London). The company will host a conference call for the global financial
community at 2.00 PM (Stockholm) / 1.00 PM (London) / 8.00 AM (New York).

The conference call will be webcast in listen-only mode on Millicom’s website at
www.millicom.com.

To participate in the conference call, please register at:

http://client.sharedvalue.net/millicom/Q411/

The dial-in number and passcode to join the conference call will be available
upon registration.

Contacts

Chief Financial Officer
François-Xavier Roger
Tel: +352 27 759 327

Investor Relations
Justine Dimovic
Tel: +352 691 750 479

Emily Hunt
Tel: +44 7779 018 539

Visit our web site at www.millicom.com