No Cell Phones Allowed Sign - Clear Visual Warning for Public Spaces #2217939 (License: Personal Use)

The image features a classic prohibition symbol-a bold red circle with a diagonal slash-overlaying a black silhouette of an older-style mobile phone with a physical keypad and antenna. The high-contrast design ensures immediate recognition and compliance in public, educational, or professional settings where silence or undivided attention is required. It serves as a non-verbal instruction to prevent disruptions from ringing phones or usage.

Commonly used on signage in libraries, classrooms, hospitals, theaters, religious venues, and meetings; matches user intent to find clear visual cues for enforcing digital etiquette or safety policies.