A cell phone does not and cannot emit a electrical discharge to ignite the gaseous fumes of gasoline. The problem is that its the driver that builds up an electrical (static) charge. This happens only after the nozzle is put into the gas tank. The driver already touched nozzle's first before inserting into the tank. The person then goes back into the car while its being pumped and sits on the car seat, rubbing it and build up static charge. Then the driver gets out without touching the outside of his car or other metal objects outside that are grounded which can help dissipate the built up electrical (static) charge. If the driver's static charge hasn't dissipated by the time he touched the nozzle, then his touching will be the source of ignition....not the cell phone. The cell phone thing is a big myth.