A foldable phone is a type of smartphone that can be bent or folded, allowing it to transform into a smaller, more compact device or unfold to become a larger screen. Full definition
Every company has shown there different types of foldable phones in Mobile Events. (dealntech.com)
We've seen their patents for foldable phones many times, before that. (onphones.com)
However, don't be surprised if we see larger displays on even smaller dimensions when foldable phones start to hit the market in the next couple of years. (androidheadlines.com)