Originally Posted by davidmanvell
Look in the security settings of the phone real hard. I think you may have it set to lock after a certain time of use/
What version of Android does your phone use?
Android version 4.0.4
under display it sleeps after 30 seconds; under security it is set to lock 30 seconds after sleep (just now changed this from 20min however, going to see if it irons out). I'm noticing that it seems to use slide when it self locks but pattern when I use the power button to insta-lock.