A theme is a set of styles and stylesheets that are applied to a device or software, to give it a new look. The term is normally used to describe the visual appearance of a device, but can also be applied to other aspects of the user interface. Themes are most commonly used to change the appearance of a program or the entire device. 

Nokia 7.1 Plus/Nokia 7.1 is a new Android theme that will make your phone look amazing. It has a beautiful collection of wallpapers and icons. You can customize your home screen to look like the phone of Nokia .1 and you will be able to enjoy a new look for a long time.