Thanks for being with Samsung and sharing your concern. We would like to inform you that My Galaxy Stories, available in Samsung smartphones, is one of the lock screen options that, once set, changes the lock screen wallpaper in a certain period of time. Be sure to hit ♡ when you find an answer that works for you. For Further assistance, you can get in touch with us via Live Chat option by following- http://livechat.support.samsung.com/Customer_new/IN. You can also connect us via Samsung Members web community by following mentioned url-https://community.samsungmembers.com/en_IN#/
