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.Research, development and trading in products and services in army cryptography and cyber details safety.I do not know if It can be was the app or the net loading so slow. Continue to they both equally from viettel and i still vote one star for th