Idea of Cellular Network Icon
This icon is for cellular network service. In the center, it has a straight vertical line with a small circle on the top of it, indicating an antenna. There's one small, unclosed circle around the top of it, then a larger circle around that one.
This page shows the different variations of the Cellular Network from an Icons8 icon pack. Feel free to resize and recolor the icon, and then download the icon in PNG format for free.