Definition: Galaxy Fold
Samsung's first foldable smartphone expected in 2019. Using a flexible OLED screen, the Fold is a 4.6" phone for making calls but opens into a 7" tablet. Initially available from AT&T and T-Mobile, the Fold is the most expensive smartphone on the market with an expected retail of just under USD $2000. See iPhone Fold, Galaxy S, Galaxy A and Galaxy C.
It's a Phone; It's a Tablet
When closed, the Fold becomes a rather thick smartphone but when opened, it offers the convenience of a 7" tablet. (Images courtesy of PCMag.com.)