This page shows the different variations of the Sieć komórkowa from an Icons8 icon pack. Feel free to resize and recolor the icon, and then download the icon in PNG format for free. Icons are available in PNG and vector.
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.