The Ministry of Information and Communications of the Socialist Republic of Vietnam (MIC) issued a new Circular 6/2021/TT-BTTTT. The Circular will enter in force from March 1, 2022. The Regulation itself becomes mandatory from July 1, 2022. It means that from July 2022 both imported and domestically produced 5G user equipment must meet the requirements specified in QCVN 127:2021/BTTTT to get access to the market of Vietnam. Official source here