Summary: Two types of foldable smartphones blur the boundaries between traditional device sizes. Fold-out and flip phones create new viewports that hint at future smartphones.
Mobile phones have evolved dramatically, with displays growing from 1.5–2.5 inches pre iPhone to 6.1–6.8 inches today. However, this growth has practical limits, as larger screens compromise single-handed use and portability. It has led to mobile-device specialization, with a range of sizes from large tablets to tiny smartwatches, each with different benefits and use cases.
Recently, a new type of smartphone that leverages the technology of bendable screens has emerged; the foldable smartphone may reduce the need to own multiple mobile devices.
Fold-Out Phones vs. Flip Phones
There are two types of foldable smartphones: flip phones and fold-out phones. The key difference lies in the folding direction and their possible sizes.