New Delhi, June 24 -- The Federal Bureau of Investigation (FBI) has issued a stark warning to millions of smartphone users across the United States, urging them to exercise extreme caution when receiving text messages, reported The US Sun.

As per the publication, the alert comes in response to a surge in highly deceptive scams targeting Apple and Samsung device owners.

According to the media outlet, organised criminal groups primarily based in China have been circulating fraudulent messages en masse, targeting over 150 million users. The messages are reportedly part of a growing cyber fraud tactic known as "smishing", in which attackers impersonate trusted institutions or officials to trick recipients into divulging personal or financia...