The iPhone ringtone has been Apple's most recognisable phone sound since the first iPhones, with its marimba-style melody becoming the default chime millions of people heard every day. As smartphones spread, that sound moved beyond phones into television, films and online videos, where it instantly tells an audience a call is coming in. Meme creators and editors later lifted the short clip for skits, pranks and reaction videos, using its familiarity as a shortcut for interruption, urgency or a badly timed call. Its simplicity and instant recognition keep it in regular use.