No Mobile Phones Sign - Prohibition Symbol for Quiet Zones & Restricted Areas #3369332 (License: Personal Use)

The image features a bright yellow circular background with a large black uppercase “NO” on the left and a red prohibition circle (a diagonal line crossing a black mobile phone icon) on the right. The design follows international signage conventions for prohibitions, ensuring immediate recognition and compliance in public or sensitive environments. Its high contrast and simple iconography make it effective even at a distance or for non-native speakers.

Commonly used in libraries, exam halls, hospitals, theaters, religious spaces, and meeting rooms where silence or device-free zones are required; matches user intent to find regulatory signage for policy enforcement or interior design compliance.