Police in South Korea have reportedly arrested two people for hacking into the network of KT Corp. , the country 's second largest mobile carrier and selling the data . According to a report by the Yonhap News Agency , police arrested a 40 - yeard - old suspect identified only by his family name of Choi as well as a second person and accused them of leaking the personal information of roughly 8.7 million mobile phone subscribers since February . ;