Luxembourg, October 16, 2025 – Millicom (NASDAQ: TIGO) expects to announce its third quarter 2025 results on November 6, 2025, via a press release.

Millicom is planning to host a video conference for the global financial community on November 6, 2025, at 08:00 (New York) / 13:00 (London).

Registration for the interactive event is required at the following link.

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: 856 1232 5655

US: +1 929 205 6099 Sweden: +46 850 539 728

UK: +44 330 088 5830 Luxembourg: +352 342 080 9265

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

For further information, please contact:

About Millicom

Millicom (NASDAQ: TIGO) is a leading provider of fixed and mobile telecommunications services in Latin America. Through its TIGO® and Tigo Business® brands, the company provides a wide range of digital services and products, including TIGO Money for mobile financial services, TIGO Sports for local entertainment, TIGO ONEtv for pay TV, highspeed data, voice, and business-to-business solutions such as cloud and security. As of June 30, 2025, Millicom, including its Honduras Joint Venture, employed approximately 14,000 people and provided mobile and fiber-cable services through its digital highways to more than 46 million customers, with a fiber-cable footprint over 14 million homes passed. Founded in 1990, Millicom International Cellular S.A. is headquartered in Luxembourg with principal executive offices in Doral, Florida.

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