From the Royole FlexPai to the iPhone Duo: How the modern foldable phone has evolved - Engadget

Foldable phones have improved, but the path has been anything but smooth. The article traces the evolution from heavy, expensive early models—like the 1984 DynaTAC 8000X at 1.7 pounds and $3,995 for roughly half an hour of talk time—to modern devices that can unfold into a larger screen. It recalls the first major headline moment in 2019 with Royole’s FlexPai at CES 2019, followed by Samsung’s Galaxy Fold in February 2019, which struggled after reviewers reported screen failures tied to a protective plastic layer and prompted a delay and recall. The author then notes that hinge durability, crease design, and screen resistance became central for success. Today, newer models such as the Google Pixel 11 Pro Fold, Samsung Galaxy Z Fold 8, and Apple’s rumored iPhone Duo keep foldables in the spotlight.