A Bristol woman lost £6,000 to internet fraudsters when they requested a new sim card in her name - then accessed her online banking.
Britain is increasingly becoming a cashless society, with over 80 million debit and credit cards cards now enabled for contactless technology.
But while many of us enjoy the convenience of shopping with plastic, it seems that crooks and fraudsters are finding even more opportunities to scam us out of our hard-earned cash.
Felicity Leath always uses her mobile to do her banking but just her phone suddenly lost all service before Christmas last year.
She rang provider EE who told here there was a problem with her sim card, and she needed to get a new one.
Felicity immediately contacted her bank NatWest to be told - not surprisingly - she had been the victim of fraud.
EE told her a fraudster had accessed her phone account, requested a new sim card and then used that to get a new passcode for her online banking.
And, when Felicity posted a warning about the sim-swap fraud on social media, she says she got a number of people commenting that she must have done something wrong.
Luckily in this case NatWest refunded the stolen amount and the bank say it was working to enhance its authentication processes as fraudsters become more sophisticated.
EE added they believe they do have good security, but on this occasion the fraudster had gathered enough of Felicity’s details to be able to deceive them.
The University of Bath is carrying out research about phone scammers, you can find more information on here.