Millicom is a group of companies offering mobile services to a population coverage of 392 million people worldwide and 75.3 million people in Africa. It was established in 1990 and has expanded globally by offering services through partnerships and joint ventures. The company is headquartered in Luxembourg and has operations in 17 countries in Asia, Africa and Latin America. In Africa, its key markets are Senegal, Tanzania, Ghana and Mauritius. Other markets served by the company in Africa are Sierra Leone, DRC and Chad. The gross mobile subscriber base of the company worldwide was 7.21 million, with 1.43 million subscribers in Africa at the end of June 2005.