No Mobile Phones Allowed Sign - Prohibition Symbol for Quiet Zones #233324 (License: Personal Use)

This high-contrast sign features a black outline of a classic mobile phone with an antenna and ringing signal, overlaid by a thick red circle with a diagonal slash-the universal symbol for prohibition. The design ensures immediate recognition across cultures and literacy levels, making it suitable for public signage where silence or undistracted focus is required.

Used in environments like libraries, hospitals, exam halls, theaters, and religious spaces to indicate that mobile phone use is prohibited; matches user intent for finding signage templates, safety compliance graphics, or educational materials on etiquette and regulations.