https://www.theguardian.com/technology/2020/feb/19/samsung-galaxy-z-flip-review-back-to-the-folding-flip-phone-future

Revamp of 2000’s flip phone means big screen folds in half into a compact clamshell that fits in small pockets

It’s not often something comes along to genuinely change the game, but the Samsung Galaxy Z Flip does just that, bringing foldable displays closer to the mainstream and reinventing the flip phone for 2020 in the process.