Telecoms giant plans to officially introduce 4G services sometime next year.
Viettel has revealed it will begin a 4G trial for users in October, at prices no higher than its 3G services.
4G, or fourth generation wireless communications technology, allows data transmission at a maximum speed in ideal conditions of up to 1 to 1.5 GB per second; many times faster than the existing 3G.
By the end of 2015 or the first quarter of 2016 at the latest Viettel will have built 12,000 4G stations.
Users wishing to access the 4G network services will need an updated SIM card.
If approved by the Ministry of Information and Communications, Viettel will officially offer 4G services sometime next year.
From now until the end of the year the group will invest in an additional 23,000 base transceiver stations, including 8,000 3G stations, 3,000 2G stations, and 12,000 4G stations, bringing its network to 90,000 base transceiver stations nationwide.