Viettel Group, headquartered in Hanoi, Vietnam, is a multinational telecommunications, technology, and manufacturing conglomerate owned by the Vietnamese Ministry of National Defense. Originally established as Sigelco (Signal Company) in 1989, the company later rebranded as Viettel. As Vietnam's largest telecommunications provider, Viettel boasts over 270 million customers across Asia, Africa, and the Americas, operating in 11 countries and territories through subsidiaries like Bitel, Mytel, Lumitel, and Telemor. Beyond telecommunications, Viettel's diversified portfolio includes investments in real estate, foreign trade, technical services, and manufacturing, solidifying its position as a major player in Vietnam's economy.