There is no setting files' just put this image (854x854) from your PC to: /home/user/MyDocs/.wallpapers/ 3. Go to Setting (on your phone) ->Wallpaper-> choice your wallpaper that you added now and press Done. After that run my application and apply Fullscreen image. After that press on on/off button -> double tap on screen -> when you see the lockscreen image -> rotate phone 2-3 times and you will see your big image..