Specifically, according to the result measured by Speedtest software in 5G Roaming service test with partner LG Uplus, Download speed reached 72.4Mbps, which was at almost optimal level on Viettel's current bandwidth and is about 10 times as fast as Data velocity via 4G/LTE Roaming (only 5-10 Mbps) on average.

Previously, Viettel had also become the first network operator in Vietnam to successfully roll out VoLTE service with Roaming partners, to provide voice service over Data network on IMS (IP Multimedia Subsystem) technology platform, therefore user’s experience was enhanced by applying HD quality calls. Especially with LG Uplus, voice connection time from Vietnam to South Korea was shortened to only 1-3 s, equivalent to only a fifth of connection time of normal voice call (8-10 s). Along with this technological upgrade, customers are able to enjoy high quality HD voice call as well as experiencing superior speed of 5G Roaming Data.

As such, not only pioneering the deployment of infrastructure network and successfully testing 5G service in Vietnam, but Viettel's 5G technology has also reached international level by meeting quality standards of LG Uplus, which is even more remarkable because Korea is one of the leading countries in 5G implementation using the most advanced technologies in the world. This is also the basis to confirm that Viettel can provide worldwide partners with high quality 5G Roaming service.

Thanks to the aforementioned success, Viettel has finished preparation for 5G Roaming explosion right after the domestic 5G infrastructure deployment is licensed and carried out, in order to serve the great national purpose: Promoting the process of becoming an 4.0 industry and the globalization and multilateralization economy, welcoming millions of international visitors to Vietnam in the era of mobile connectivity, Internet of things in period 2020 - 2030.

In order to search for more information about Roaming packages with attractive benefits, please visit website: http://roaming.vn/cvqt or call 198 (free of charge).

Note: The main reason for difference between 5G Roaming Data speed and domestic 5G Data velocity was that limit had been set by LG Uplus on Roaming customer Profile to avoid incurring high charges because of extremely fast speed.