Strictly Prohibited, Phone, Cell Phone
This is a "No Mobile Phone" sign, which consists of a red forbidden symbol and a mobile phone. The icons presented on different platforms are different. Background colors in prohibited symbols mainly include black, white and gray. Except that the HTC platform shows a blue and gray mobile phone, which is larger than the forbidden symbol; The mobile phones displayed on other platforms are all black, gray or white, and they are all within the forbidden symbol range. Except OpenMoji and Messenger platforms, which are simple in design style and represent mobile phones through a rectangular frame, other platforms all depict the screens and even buttons of mobile phones.
The "No Mobile Phone" sign is often used in exams, libraries or interviews to prevent fraud and to be quiet. Therefore, the emoji is often used to specifically refer to "no use of mobile phones", and can also be extended to mean "keep quiet".
