For Android devices
1. Start setting your home screen by pressing and holding a blank area on your screen (where no apps are placed), and home screen options will appear.
2. Select 'Add wallpaper.'
3. Choose either 'Home screen', 'Lock screen', or 'Home and lock screen.'
4. A set of options will appear to choose where the background image will be coming from. Select Gallery.
5. Select 'Done' to save.