Expert : Wireless carriers fix a bug that would have allowed criminals to hack into cell phones . A German cryptographer who specializes into SIM cards says he fixed the bug . SIM cards can identify a phone 's owner and store some sensitive personal data . While phones are known to be susceptible to a range of security issues and attacks , the old dependable SIM card was considered safe . The ` ` white hat '' hacker presented his findings at a computer - security conference .
Expert : Wireless carriers fix a bug that would have allowed criminals to hack into cell phones . A German cryptographer who specializes into SIM cards says he fixed the bug . SIM cards can identify a phone 's owner and store some sensitive personal data . The ` ` white hat '' hacker presented his findings at a computer - security conference .