As Viettel won the B2-B2’ block, it is barred from the current auction, leaving VNPT and MobiFone as the main contenders. — VNA/VNS Photo

HÀ NỘI — The Ministry of Science and Technology has announced a re-auction of two important mobile frequency blocks – B1-B1’ (703–713 MHz and 758–768 MHz) and B3-B3’ (723–733 MHz and 778–788 MHz) – both considered essential to expanding the coverage and performance of 4G and 5G networks across Việt Nam.

According to the ministry’s plan, the starting bid for each frequency block is set at VNĐ1.955 trillion (US$75.2 million). The auction will follow a direct ballot process with increments of VNĐ20 billion per round. Winning telecom companies will be granted 15-year licences to utilise the spectrum.

These blocks had previously been scheduled for auction in early 2025 alongside the B2-B2’ band (713–723 MHz and 768–778 MHz). However, that round failed due to a lack of participation, with only one bidder submitting the required deposit.

In May 2025, the re-auction of B2-B2’ was successfully conducted, attracting both Viettel and VNPT. After two competitive rounds, Viettel emerged as the winner.

As per regulations, the company that won the B2-B2’ block – Viettel – is barred from participating in the current auction for the remaining B1-B1’ and B3-B3’ bands. This leaves major telecom operators VNPT and MobiFone as the primary potential bidders, although the auction could be delayed or cancelled again if participation remains limited.

Organisations wishing to participate must submit an application for eligibility confirmation to the Authority of Telecommunications (under the Ministry of Science and Technology) within 30 days of the auction plan’s public announcement.

The two frequency blocks being auctioned are part of the 700 MHz band, which is considered highly valuable due to its low frequency. Lower frequency bands allow mobile signals to travel further and penetrate buildings more effectively. Compared to higher bands like 1800 MHz or 2100 MHz, the 700 MHz spectrum can significantly improve coverage, especially in rural and remote areas.

Globally, the 700 MHz band is widely used for next-generation mobile technologies. In Việt Nam, this band was formerly used for analogue television broadcasting but has since been reassigned for telecommunications following the nationwide transition to digital TV.

The reallocation and auction of the 700 MHz spectrum is a key step in implementing the country’s digital infrastructure strategy under Resolution 57 of the Politburo. The strategy identifies science, technology, innovation and digital transformation as breakthrough areas for national development.

In addition to expanding mobile broadband services such as 4G and 5G, these frequency bands will also support a wide range of digital services, including smart city development, intelligent traffic management, remote education, IoT-based solutions and smart agriculture. — BIZHUB/VNS