I updated my phone samsung s6 edge but the unlock effect dissappeared. When i open the password and security on settings, there is no option of unlock effect.
That also happens on my note5 6.0 1 , it seems that it's a bug on new devices . Try this method it may help
1-change lock screen type to pattern
2-now restart your device
3-change the wallpaper to original
4-put lock screen type : swipe . Then it should work . Plz reply if that helped/worked or not