There are news shown that the iPhone firmware 3.0 is having Security Vulnerability, which can, In theory, allow malicious hackers to take over the control of your iPhone.

Using a flaw they’ve found in the iPhone’s handling of text messages, the researchers say they’ll demonstrate how to send a series of mostly invisible SMS bursts that can give a hacker complete power over any of the smart phone’s functions. That includes dialing the phone, visiting Web sites, turning on the device’s camera and microphone and, most importantly, sending more text messages to further propagate a mass-gadget hijacking.

Security researchers Charlie Miller and Collin Mulliner have notified Apple about the vulnerability over a month ago, Apple has now came out with the fix for this Security Vulnerability, on firmware 3.0.1.

Charlie Miller would suggest you turn the device off as quickly as possible if you happen to receive an SMS text message containing only a single square character. Or, upgrade your iPhone.