allowed malicious parties to send seemingly harmless text messages to an iPhone and gain access to various function of the device - such as the camera or contacts. The user would reportedly be unaware of the intrusion.

Security researchers Charlie Miller and Collin Mulliner demonstrated the SMS flaw at the in Las Vegas on Thursday.

Apple was quick to fix the problem after it went public, although the two researchers said they told the Cupertino company about the flaw a month ago. Google has already fixed the flaw for its Android OS, the .

To download the 3.0.1 security update, connect the iPhone to your computer, click on the "Check for update" button and follow the on-screen instructions.