The process is really simple, and you can create some pretty cool effects with the lock screen, like in my article image above.
Read on on how to do this with your BlackBerry 10 plus check out my bonus tip at the end!
Go into the settings or pictures app, and change your wallpaper to the image you want to use for your lock screen.
Open the Settings app > Security and Privacy > Parental Controls.
Turn on Parental Controls - but you don't need to change any other settings if you don't want to.
Now close the settings app. If you haven't used Parental Controls before, you'll see that the wallpaper has changed to the default carrier wallpaper. Now change the wallpaper to the image that you would usually use.
Done! You can now lock the screen, and as you swipe up to unlock your BlackBerry 10 you'll see that you have two different images.
One of the really nice things about Parental Controls is also that it has a separate homescreen layout to your normal layout. This is really useful if you let your kids play games on your phone or allow other family members to use it.
Simply rearrange the icons to suit the 'locked' profile and then use Parental Controls to switch between the different phone profiles. It's not quite BlackBerry Balance - but it's pretty close!
And don't forget to check out BBThemes in BlackBerry World. Thanks for the tip, Dave!