I have just down downloaded latest upgrade on Galaxy S6 and afterwards my wallpaper settings were reset to the factory settings. Despite resetting wallpapers from my Gallery after a short while they revert to factory settings. How do I fix this?
Welcome to Android Central! Are you selecting one of the preinstalled wallpapers, or an image from your own gallery? What if you pick a live wallpaper?
I am using images from my camera gallery. I have tried saving direct from the gallery and also from the saved image in the wallpaper image gallery. The Wallpapers remain for 30 mins and then revert to the Samsung factory images.
There seem to be a number of issues being raised with the Marshmallow update on the S6 in these forums. Have you already tried wiping the cache partition? https://support.t-mobile.com/docs/DOC-21095