Cong Nghe Va Phat Trien Ha Tang Vien Thong Unitel Joint Stock Company Address: No 4, Lot 1D, Trung Yen, Trung Hoa Ward, Cau Giay District, Ha Noi City Enterprise code: 0103143641 Phone: 02422210220 Representative: Le Anh Xuan Adress: No 21/403, Bach Mai Street, Bach Mai Ward, Hai Ba Trung District, Ha Noi City Trung Hoa Ward, Cau Giay District, Ha Noi CityFounding date: 6 - 1 - 2009