Lock Screen Wallpaper I don't know how to have a lock screen wallpaper on my phone. I'm using an Android 5.1 Lollipop (Omega HD3, Cherry Mobile). Where can i find the setting to set my lock screen wallpaper on my device?
Go to the gallery, find the picture you would like to set as Lockscreen wallpaper.
When u have the picture opened, in the menu ( 3 dots - usually) there is Set as..

Just click it and it will ask you for " Set as Homescreen wallpaper / Set as Homescreen wallpaper and lockscreen wallpaper  /  Set as lockscreen wallpaper"

Now select your option.