This is a video which will show you that how Mobile Phone are dangerous near Petrol pumps.  In this case employee was trying to use his cellphone’s illuminated screen as a source of Light- as it was dark by the dome area on the top of the truck.

Cell-phones can be a source of ignition.

Please inform all your families , friends and loved ones, that gasoline itself is not the problem, it is the vapours emmited that caused what you are going to see in this video.

That said, standing “a bit away” from the pump might still not be enough (based on the amount of fumes emitted), so, PLEASE, no cell-phones around the pump areas in gas stations.
Here is the Video which will show you this-