
Don't reply to calls, emails, or text messages that request personal information.Here's what you can do to protect yourself from a SIM card swap attack: And sometimes it's an inside job, with phone company staffers helping to make the switch, as alleged by federal prosecutors in a case this spring. Sometimes they'll fool the phone company into believing they're the number's rightful owner, who lost the phone and needs to transfer service to a new device. It was a SIM-swap - a "social engineering" trick fraudsters use to take control of somebody else's phone number. And I go, 'Oh no, something's happened here.'" "I look at my phone and there's no signal. And all of a sudden my phone went dead," he says. "I was having trouble getting into my email account. So when his smart phone started acting funny one day last April, he got a bad feeling. Gregg Bennett is an entrepreneur in Bellevue, Wash., and he knows a bit about tech.


After regaining control of his number, Gregg Bennett says he received this automatic text message from the AT&T store in Boston that he believes was used by the SIM-swappers.
