https://www.theverge.com/2019/2/20/18231249/samsung-galaxy-fold-folding-phone-features-screen-photos-size-announcement

Samsung first teased its foldable phone back in November, and at the company’s Galaxy Unpacked event today it’s further detailing its foldable plans. Samsung’s foldable now has a name, the Samsung Galaxy Fold, and the company is revealing more about what this unique smartphone can do. Samsung is using a new 7.3-inch Infinity Flex Display that allows the phone itself to have a tablet-sized screen that can be folded to fit into a pocket.

The main display runs at 1536 x 2152 resolution, and when it’s folded, a smaller 4.6-inch (840 x 1960) display is used for the phone mode. Samsung has built a sturdy backbone to the device, with a hinge system that has multiple interlocking gears. All of these gears are hidden at the rear of the device, and allow the Galaxy Fold to transform from tablet to phone modes.