ok i've just updated my iphon 4 to ios 5 and the camera button doesn't appear in the lock screen even if i tap the home button twice. the ipod menu shows up but the camera button doesn't. anyone knows what could be the problem?
The camera button isn't very noticeable. If it shows up, t's at the right edge of "slide to unlock" on the lock screen. To get to emergency call, you actually have to go past the slide to unlock screen and, if your phone has an unlock code, you can now see the emergency call button. To get back to the screen that includes the camera button, you have to hit cancel.
If you are on a lock screen without ipod controls or a camera button, hit home twice and it toggles those elements on or off.