A foldable smartphone is a form factor of smartphone, which allows access to a larger tablet-like display or a phablet when needed by unfolding the device, whilst maintaining a similar or smaller footprint and functionality to a standard smartphone when folded (typically along a vertical axis). The screen may either wrap around to the back of the device when folded (as with the Royole Flexpai and Huawei Mate X), or use a booklet-like design where the larger, folded screen is located on the interior, and a screen on its "cover" allows the user to interact with the device without opening it (such as the Samsung Galaxy Fold).