No Mobile Phones Sign - Clear Prohibition Symbol for Public Spaces #2217587 (License: Personal Use)

The image features a bold yellow circular background with the black uppercase letters “NO” on the left and a red prohibition circle (with diagonal slash) overlaying a black mobile phone icon on the right. Designed for high visibility and instant comprehension, it follows standard ISO safety signage conventions for prohibitions. The contrast of yellow, black, and red ensures readability from a distance and across diverse lighting conditions.

Used in libraries, exam halls, theaters, hospitals, laboratories, and secure government or corporate facilities where mobile phone usage is restricted. Matches user intent for finding authoritative, printable no-phone signage for policy enforcement or wayfinding.