Ban Khach Hang Ca Nhan - Chi Nhanh Tong Cong Ty Dich Vu Vien Thong Address: No 216, Tran Duy Hung Street, Trung Hoa Ward, Cau Giay District, Ha Noi City Enterprise code: 0106869738-001 Phone: 02438358814; 02438357502 Representative: Ho Duc Thang Adress: No 164, Hue Street, Ngo Thi Nham Ward, Hai Ba Trung District, Ha Noi City Trung Hoa Ward, Cau Giay District, Ha Noi CityFounding date: 17 - 7 - 2015