The term "flip phone" refers to a mobile phone that has a hinge or clamshell design which allows the user to flip open and close the device. However, there are several other synonyms for a flip phone which offer interesting variations. For example, a "clamshell phone" is another popular name for a flip phone. "Folder phone" is a less common synonym which describes the phone's ability to fold and unfold much like a folder. Additionally, "flip-top phone" or "shell phone" offer similarly descriptive alternatives. While "smartphones" are now the norm, flip phones still hold a special place in mobile technology history and offer an interesting contrast to the sleek touchscreens of their modern counterparts.