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Beware SIM-swapping Attacks

Most people consider their Social Security number to be their most valuable personal data. Another threat is brewing that targets your mobile phone number — yes, the phone you use for 2-Factor Authentication and resetting your website passwords!

Here’s how it works:

  1. Criminal somehow acquires your mobile phone number then gathers some basic information about you
  2. Criminal calls your mobile carrier and impersonates you requesting them to reassign your mobile number to a different phone
  3. Criminal then uses this phone to change passwords on one or more of your valuable accounts
  4. Criminal then withdraws funds or commits other havoc with your accounts

Here are some tips to help prevent SIM-swapping:

  • Begin keeping your mobile phone number a secret
  • Immediately contact your mobile carrier (AT&T, Sprint, T-Mobile, and Verizon are the major carriers) if your mobile phone unexpectedly stops working
  • Each month watch your financial statements for irregularities
  • Remove your mobile number from email signatures and online accounts
  • Acquire a free Google Voice phone number to use instead, and configure it to forward to your mobile phone

Check out this article about SIM-swapping on

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