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 services in armed forces cryptography and cyber information stability.I do not know if It can be was the app or the net loading so slow. Still they both of those from viettel And that i nevertheless vote one star