Welcome to iPhone 101, the series that explains the basics of iPhone operation. This time, it's making sure Siri doesn't let anyone use your locked iPhone.
Almost immediately after the release of the iPhone 4S, TUAW started receiving emails from readers who noticed that even when they had a passcode set on the lock screen, someone could pick up their device and issue commands to Siri. This means that unauthorized persons can easily pick up the iPhone 4S, press and hol
