South Korea’s science ministry is introducing face authentication in the mobile phone sign-up process from July 6 across major carriers and budget operators, while allowing users to choose alternative verification from the start. The ministry said the opt-out reflects recommendations from privacy and human rights bodies, but it plans to monitor dealers to prevent intentional bypassing. Critics question whether the policy can curb illicit phone lines if it is optional.

The number of mobile subscribers switching carriers in South Korea fell in April from the previous month, industry data showed. A total of 566,576 subscribers ported their numbers in April, down 65,891 from 632,467 in March, according to the Korea Telecommunication Operators Association. The number of subscribers porting to SK Telecom, KT and LG Uplus all declined from March. The drop was attributed to a fading boost from new handset launches and weaker demand after the new school term.