Why gas stations can not call the phone?
When the RF current in the metal conductor between the circulation, in case of corrosion or poor contact, it will produce radio frequency sparks.
A mobile phone is a radio communication tool that emits radiated radio waves (radio frequency electromagnetic radiation) that can cause radio antennas to sense radio frequency currents.
People in order to make the communication signal more clearly, the use of mobile phones is very high frequency, transmission power is relatively strong, despite the national standards, but also on the fuel, filling stations constitute a serious threat.