From the Royole FlexPai to the iPhone Duo: How the modern foldable phone has evolvedhttps://www.engadget.com/2286505/how-modern-foldable-phone-evolved-from-royole-flexpai-to-iphone-duo
Apple's iPhone Duo likely forecasts a shift in the market toward foldables becoming more common. But it took a while to get here.
