2012: Nhà cung c?p d?ch v? vi?n thông t?t nh?t th? gi?i t?i các th? tr??ng ?ang phát tri?n – WCA.Study, improvement and trading in products and services in military cryptography and cyber information security.Social Duty Culture is the muse for prosperous enterprises. Viettel is committed to reinvesting in society by means of linking creation