Mobile phone users should watch out for text messages containing a website link, security experts have warned.

The link could download a Trojan horse onto your phone and represents a new form of security risk, tentatively titled "SMiShing" by McAfee - a compound of phishing and SMS.

Some mobile users have started receiving an SMS that reads: "We're confirming you've signed up for our dating service. You will be charged $2/day unless you cancel your order," David Rayhawk wrote in a McAfee Avert Labs blog.

The message includes a URL which, if clicked on, downloads a Trojan horse that could allow a Web-enabled phone to be controlled by hackers.

SMiShing is another example of how hackers are injecting cell phones and other mobile devices with malware and viruses which could penetrate enterprise networks, according to Rayhawk.