Abstract: The Courteous Phone Usage System (CPUS) includes devices and methods and system for assisting cellular phone users to conduct cell phone conversations in a low speech level and with minimal annoyance to other individuals in the immediate vicinity, while providing a certain level of privacy for the cell phone user. The cell phone provides audio, visual, tactile or a combination thereof feedback to the cell phone user when his speech is above a certain threshold. The cell phone user may then take a cue from the feedback and accordingly modify his speech level in real-time.