A foldable phone can close in half. It becomes short and easy to carry. It can fit in a small pocket. Many small foldable phones have two screens. The big screen is inside. A small screen is outside. You can see the time there. You can also read short messages. Some phones take photos while closed. (samsung.com)
This saves time in daily life. For example, you are on a train. Your stop is near. You check the small screen. You do not open the phone. Then, it goes back into your pocket. Small outside, big inside. That is the fun idea.










