Recently Macworld reported a flaw in the new iPhone 4S. A new feature called Siri is a voice-activated feature that allows users to make all sorts of voice commands. But, with the default setting on, Siri is accessible even while the phone is locked. This will allow anyone to send e-mails and text messages, and make calls without entering a passcode. Without entering a passcode, users have limited access. For example, calls and texts can’t be made to people that are not in the contact list. Although there is limited access, unwanted users could still perform unwanted actions.
Turning off the default setting would be the simple solution to this problem, but I don’t see why Apple would allow such access while the phone is locked. It somewhat defeats the purpose of locking the device despite the fact that there is limited access. It may be a convenience to not have to unlock the device to access certain things but is it worth it? It’s pretty much up to the user to have convenience over security.