INVITATION TO CONFERENCE CALL ON ONLINE SERVICES INVESTMENT

Stockholm, August 16, 2012 – Millicom International Cellular S.A. (“Millicom”)
(Stockholmsbörsen: MIC) will host a conference call for the global financial
community on Monday, 20 August 2012 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.

Dial-in information:

Please dial-in 10 minutes before the scheduled start time to register your
attendance. Dial-in numbers for the call are as follows:

Sweden: +46(0) 8 5876 9446

UK: +44 (0)20 7136 20 54

US: +1 646 254 3361

The access code is: 76 88 041
Contacts

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

Investor Relations
Justine Dimovic
Tel: +352 691 750 479

Visit our web site at www.millicom.com
About Millicom

Millicom International Cellular S.A. is a global telecommunications group with
mobile telephony operations in 13 countries in Latin America and Africa. It also
operates various combinations of fixed telephony, cable and broadband businesses
in five countries in Central America. The Group’s mobile operations have a
combined population under license of approximately 270 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., and Millicom
International Cellular S.A. employees or representatives 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.