i have had changed wallpaper inside Keyguard.apk
set the permission to RW-R-R
move to root/system/priv-app second time flashed thru recovery
i did wipe cache/dalvik second time not
after that there is an error and i cannot use System UI, unless flashing stock Keyguard.apk and it will go back
question is how to change wallpaper of UPSM without having an error "android.systemui has stopped"
using S5 Sensation ROM