12/12/2017 at 20:50 (GMT) Theo dõi Vietnamhoinhap trên Viettel is Vietnam’s most valuable brand at US$2.5 billion VNHNVNHN - Viettel ranks first among the 50 most valuable brands in Vietnam at US$2.569 billion, the military-run telecoms company announced on December 5. Theo Nhandan.com.vn