How To Lock Screen – Nokia Lumia 928
Learn how to lock screen on your Nokia Lumia 928. Select Settings icon > lock screen. You can select which apps show their status on your lock screen.
Change the lock screen wallpaper
Tap Settings icon > lock screen > Background.
Tap change photo
Select a photo, and tap Save icon.
You can adjust the photo by zooming in and out, or by sliding the photo up or down, and left or right before selecting Save icon.