Lock screen wallpaper

[xGuty]

How can i change the lock screen wallpaper? When I try to change it with the oukitel theme app it does not work

 

[andyc2004uk]

Hi. You could try using the Gallery app that should have come with your phone (it came with mine) - select the picture you want, use the 3 dots on the bottom right and select 'use picture as'. That should bring up a menu asking which app to use (if you have more than 1 media viewing app), if it does, click the icon that looks like the gallery app (square with purpley stuff in it). Once you've done that, move/crop your picture then press 'set wallpaper' in the top left. That should give you the option to choose which screen to set it as. I've attached some pictures that should help.
Hope this helps!