I have this problem for about month or two. Its about the lock screen when I put my phone (Galaxy S5) to charge. There aren't any so called adds but it displays photos which can sometimes be very weird. My apps are basic apps that you can find on every phone and I don't have any "cheap" wallpaper apps or something. Thanks for answer.
P.S. Over these weird photos there's a clock and "Good Morning/Afternoon/Evening..." message!
P.S. Over these weird photos there's a clock and "Good Morning/Afternoon/Evening..." message!