Mobile phones that are commonly known as "notes" are a line of devices from the Samsung Galaxy series. These phones are known for their large display and long battery life, as well as their ability to be used as a digital stylus. The name "note" is derived from the fact that they can be used as a note-taking device, and the stylus provides a more comfortable and accurate way to input information than using a finger. Additionally, the large display allows for more functionality, such as multitasking and split-screen features, which make the phones more efficient and convenient. The Samsung Galaxy Note series has become a popular choice among many users, due to its features and capabilities.