IOS 4.1 Bug Lets you Bypass Lock Screen
It works by hitting the emergency call button and dialing a random number. When you do that and hit call, you quickly switch off the phone and switch it back on. Once
this is done, the calling section of the phone is available.
When we are in the calling section we can browse around contacts, recent calls, favorites etc. and we can make calls to any number. What you cannot do is switch your
phone off when in this menu. To do this, you need to make a call and then hang up and switch off and back on to get back to the regular lock screen.