A flip phone is a type of mobile phone that features a hinged design, allowing it to open and close like a book. When closed, the phone's screen and keypad are protected, making it compact and portable. Flip phones typically have physical buttons and a smaller display compared to modern smartphones. These devices were popular in the early 2000s and are known for their simplicity and durability. While they lack advanced features like touchscreens and app stores, many users appreciate their ease of use and longer battery life. Some people still prefer flip phones for basic communication without distractions from social media or apps.