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17h ago

SK Telecom Faces Scrutiny Over Massive USIM Data Breach Response

Acting President Han Duck-soo orders a joint probe into SK Telecom's handling of the breach, as free USIM replacement services prepare to launch on April 28.

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Acting President Han Duck-soo (Yonhap)
SK Telecom Chief Executive Officer Ryu Young-sang (C) and other senior executives bow in apology during a press conference at the company's headquarters in Seoul on April 25, 2025, for causing trouble over a network hacking incident involving the potential leak of subscriber information. (Yonhap)

Overview

  • SK Telecom detected a cyberattack on April 18, exposing USIM data of its 23 million subscribers and prompting a massive response plan.
  • The company will begin offering free USIM replacements on April 28, an initiative expected to cost 177.1 billion won (US$122.9 million).
  • Acting President Han Duck-soo has instructed a joint civilian-government investigation to review SK Telecom's response and analyze the breach's causes.
  • 5.54 million customers (24% of subscribers) have enrolled in SK Telecom’s USIM protection service to mitigate potential hacking risks.
  • Critics and customers have raised concerns over stock shortages and access issues for vulnerable groups needing USIM replacements.