Samsung is reportedly working on a dual screen phone that will come with a rear-facing transparent display in addition to the primary display. The patent application for the dual screen handset from Samsung is said to have been discovered at the World Intellectual Property Office (WIPO) and filed in January.

source https://gadgets360.com/mobiles/news/samsung-dual-screen-rear-transparent-display-phone-3291377#rss-gadgets-all