Recently I installed Go Locker and changed permissions to allow GL as my main locker. However, I got bored of the lock screen always being in portrait so I removed and I cleared all defaults. In fact, I reset all defaults on my tablet. I cannot find the stock Xperia lock screen though. I have been in both personalization and display but no option to activate. I have enabled the double tap to wake up and changed the wallpaper for the lock screen but still nothing. Can anyone help?