Skadden, Arps, Slate, Meagher & Flom is advising French tech billionaire Xavier Niel and his investment vehicle Atlas Investissement in a multi-billion takeover bid for Latin America telecom operator Millicom International Cellular S.A.

Atlas already owns a 29% stake in Millicom, a Luxembourg-based company listed on the Nasdaq Exchange in New York and Nasdaq Stockholm in Sweden, which operates under the brand name Tigo in Latin America. Millicom claims about 45 million customers across nine Latin America countries.