Etiquette rules for using a cell phone advise users to avoid cell yell.

Cell Yell

Speaking loudly on a cell phone, often in public spaces, without regard for those nearby.

Etiquette Rules

Guidelines that govern socially acceptable behavior and norms within a society or group.

Cell Phone

A Cell Phone is a portable telephone that can make and receive calls over a radio frequency link while the user is moving within a telephone service area.