Hanoi, April 9 -- Mobile subscribers in Vietnam will be required to undergo facial biometric verification when changing devices from April 15, 2026 under Circular No. 08/2026/TT-BKHCN issued by the Ministry of Science and Technology, a move aimed at tightening SIM management and enhancing user security. The new regulation mandates that within a maximum of two hours after detecting a device change from the previously registered device, telecom operators must review and identify the activity, then temporarily suspend outbound services such as calls and SMS and ask subscribers to complete facial biometric re-authentication. For human-to-human mobile subscribers, outbound services will remain suspended until verification is completed. Users a...