South Korean mobile provider SK Telecom has announced free SIM card replacements to its 25 million mobile customers following a recent USIM data breach, but only 6 million cards are available through May. SK Telecom is the country's largest mobile network operator, serving roughly half of the domestic mobile phone market. On April 19, the company detected a malware running on its network that allowed threat actors to steal customers' Universal Subscriber Identity Module (USIM) data, typically in...