A suoneria gratis is a sound that a mobile phone (or cell phone) makes to alert the user of an incoming call or message. Originally referring to the electromechanical striking of bells, the term now also refers to any sound on a portable communication device that alerts the user to an incoming call.

A ringtone is the melodic sounds that a mobile phone plays when an incoming call is received or an SMS is sent, or whenever the device's alarm or notification features are activated. Ringtones can be saved as short musical snippets or as complete songs, and they are available in various musical genres.