Users of UK smartphones are being targeted by scammers
7 November 2011 Last updated at 12:14 GMT
A national computer security campaign is urging smartphone users to do more to protect themselves from unwittingly downloading malware applications.
Get Safe Online says that there has been an increase in smartphone malware as the market has grown.
Criminals are typically creating Trojan copies of reputable apps and tricking users into installing them.
Once on the phone, the app can secretly generate cash for criminals through premium rate text messages.
Matt Prodger reports.