WARNING: Siri Can Be Activated From Lockscreen Even With A Passcode Enabled!
It has come to the attention of many iPhone 4S users that even if you have a passcode enabled, Siri can still be activated from the Lockscreen. This, of course, means that if someone (possibly a thief) has your iPhone they can make a call, send a text, or do other potentially harmful things.
a small video demo showing how Siri can be activated from Lockscreen:[media url=”http://www.youtube.com/watch?v=UM0Ee4KW5-I”]
Although this security flaw is present, it is very easy to fix! All you have to do is open the Settings application, go to the passcode lock preferences, and toggle Siri to “off.”
Consider yourself warned; be careful! Apple were surely fix this in their next update for iOS 5.