Notice of third quarter 2021 results and conference call

Notice of third quarter 2021 results and video conference

Luxembourg, September 29, 2021 – will announce its third quarter 2021 results on October 28, 2021 at approximately 12:00 (Stockholm) / 11:00 (London) / 06:00 (Miami) via a press release.

Millicom will host a video conference for the global financial community on October 28, 2021 at 14:00 (Stockholm) / 13:00 (London) / 08:00 (Miami).

Registration for the interactive event is required at the following . After registering, you will receive a confirmation email containing details about joining the video conference. Participants who wish to ask a question during the live event must notify the Investor Relations team via email to after the start of the event.

Participants may also join the conference in listen-only mode by dialing any of the following numbers and entering the Webinar ID: 824 3416 1714:

US:                                           Sweden:

UK: 0                                        Luxembourg: 65

Additional international numbers are available at the following . Accompanying slides and a replay of the event will be available on the .

For further information, please contact:

About Millicom

Millicom (NASDAQ U.S.: TIGO, Nasdaq Stockholm: TIGO_SDB) is a leading provider of fixed and mobile services dedicated to emerging markets in Latin America and Africa. Millicom sets the pace when it comes to providing high- speed broadband and innovation around The Digital Lifestyle® services through its principal brand, TIGO. As of December 31, 2020, Millicom operating subsidiaries and joint ventures employed more than 21,000 people and provided mobile services to approximately 55 million customers, with a cable footprint of more than 12 million homes passed. Founded in 1990, Millicom International Cellular S.A. is headquartered in Luxembourg. For more information, visit: . Connect with Millicom on , ,  and .

Attachment