At & T Viet Nam Joint Stock Company Address: No 27, 93 Hoang Van Thai Lane, Khuong Trung Ward, Thanh Xuan District, Ha Noi City Enterprise code: 0105929286 Phone: 02466823838 Representative: Nguyen Hong Kim Adress: Chan Hung Hamlet, Gia Trung Commune, Gia Vien District, Ninh Binh Province Khuong Trung Ward, Thanh Xuan District, Ha Noi CityFounding date: 26 - 6 - 2012