India, Feb. 9 -- The FBI is sounding the alarm about a new and particularly nasty scam targeting smartphone users. While scam calls aren't a new phenomenon, this latest scheme is more devious and harder to detect, leaving many iPhone and Android users vulnerable. Federal agents warn that the scam involves a clever combination of phone calls and tech tricks, making it more difficult for people to recognise when they are being targeted.

The scam works by impersonating trusted entities like technical support, banks, the US Customs and Border Protection (CBP), or even local police forces. The fraudsters use caller ID spoofing to make their calls appear legitimate, tricking unsuspecting victims into believing they are speaking with a trusted ...