My 4S is jailbroken but can someone with non-jailbroken one try this too? I have tested it extensively and it works every time if you do the following (strictly): Presets: - Settings -> General -> Passcode Lock set to ON, Simple Passcode, Require Passcode after 1 min (just to make the test faster, doesn't seem to work with immediately setting). - Auto-Lock set to 1 min (again, to make the test faster) - Let the phone idle and timeout both the auto-lock and passcode lock period (> 2 mins, I did wait longer to make sure). - Do NOT wake it up by pressing anything. It won't work if you wake it up to verify that the passcode is in place. It should be if you wait long enough. Bypass Passcode: - Make a call to that (now supposedly locked) phone. - Answer it. Hang up. After the call ends, the screen should go black, immediately press the home button to turn on the screen, slide to unlock and now you're in the homescreen without having to enter any passcode. Other Possibilities: But then again, I have a lot of tweaks, so if this doesn't work for anyone, I need to find out what tweak is causing this. From the top my head, these could be the culprits: LockInfo & its widgets.