Antenna, Cell Phone, Bar Graph, Mobile Phone Signal
This is an icon called "Signal Strength", which is depicted as five parallel rectangles, from left to right, showing a state of increasing in turn.
In the design of some platforms, there is also an icon of a signal tower on the upper left of the rectangular pattern, which is composed of a triangle with its bottom facing up and its sharp angle facing down and a straight line, which starts from the top of the triangle and extends downward and hangs in the middle of the whole triangle.
Generally speaking, the better the signal, the higher the intensity bar; On the contrary, it is lower. It should be noted that different platforms present different colors of background frames. For example, the Microsoft platform presents a blue base map with a black frame; In the Facebook platform, the green background color is depicted; Google platform depicts an orange background frame.
The emoji is generally used to mean signal intensity, volume, brightness, etc.
