Just a few days ago, I noticed a new lock screen appearing on my Galaxy S5, when I unplug it from the charger. It is full screen, does not have any ads and the background picture changes periodically like a wallpaper slide show. It also says "Good Morning" (or Afternoon, etc. depending on the time of day) and shows the current location and temperature. At the bottom it says slide to unlock. When I slide, it reveals my regular pin pad secure lock screen. It reappears when I plug in the charger and then again when I unplug it, but at no other times. It also started appearing on my wife's S5 today. We don't have any 3rd party battery charging boosters, file managers, etc. that I know of. Could this be some sort of malware? It seems innocuous, but not sure if I can trust it or how to get rid of it. The last software update was about a month ago and this did not appear until just very recently. Has anyone else experienced this or have any ideas?