DENISON, Tex. (KXII) It's called 'Sim Jacking' or 'Sim Swapping' and it's another way thieves are trying to steal your information.
It looks like you're receiving a call from your phone's carrier, except once you answer, you may not be able to open your phone again - meaning it could shut off completely.
"It appears right now to be Verizon phones." said Lt. Mike Eppler with the Denison Police Department.
Eppler said he encourages all Verizon mobile customers to report anything that doesn't seem right.
"If you determine that your phone has been compromised, you need to contact local law enforcement because it's identity theft." Eppler said.
He said catching the signs early on could help.
"Something out of the ordinary, something you wouldn't normally have to deal with, such as the voice mailbox not being set up. That is definitely an indicator that something could be very wrong." Eppler said.
Montague County Sheriff's Chief Deputy Jack Lawson wrote in a Facebook post that he's received several reports of cell phones that have 'just stopped working', warning people that their phone numbers may have been stolen.
Verizon Wireless Corporate also said in a statement to News 12, "To protect yourself from SIM Swapping Fraud, Verizon recommends that you call customer service, and put an administrative lock on your account."
Police say that the reports have all been Verizon customers right now, but they say it could happen to anybody.
If you are unsure about something on your phone, you can contact the Verizon customer service line, at 1-800-922-0204.