No Mobile Phones Sign - Official Prohibition Symbol for Quiet Zones #1239447 (License: Personal Use)

This universally recognized symbol features a black silhouette of a classic mobile phone with a keypad and antenna, overlaid by a bold red prohibition circle and diagonal slash. The design follows ISO 7010 safety signage standards for clarity and immediate comprehension across language barriers. It is commonly displayed in environments requiring quiet or undivided attention.

Used in public venues like cinemas, libraries, hospitals, exam centers, and religious spaces where phone use is disruptive or unsafe; matches user intent to find signage for policy enforcement or compliance documentation.