“To reproduce the bug, make sure to have a passcode lock turned on and lock your device. In the lockscreen, tap on Emergency Call in the lower left corner. Now type a non-existent emergency number, I tried #946494. Start the call, and as soon as the red button appear hit the sleep button. You’ll be brought to the contact list.”The issue will most-likely get patched by Apple in the 4.2 update coming later this month, but it’s not the first time the emergency call screen has been exploited. Both iOS 2.1 and iOS 2.0.2 suffered from passcode lock bugs. Hopefully Apple pays extra attention and really secures Phone.app this time.
We were able to recreate the issue in the video above. Any readers out there seeing the same results? Let us know your thoughts on this in the comments below!
UPDATE: This bug appears to already be fixed in iOS 4.2 beta, which is due to be released in November.