Vien Thong Tam Dao Mobile LTD Address: Nuc Ha Hamlet, Ho Son Commune, Tam Dao District, Vinh Phuc Province Enterprise code: 2500587125 Phone: 0973666999 Representative: Dang Van Hung Ho Son Commune, Tam Dao District, Vinh Phuc ProvinceFounding date: 25 - 7 - 2017