What is the evidence to suggest that Cell Phones produce a spark to ignite combustable fumes?
In petrol forecourts the use of Cell Phones is discouraged. Whether this is because of the danger of explosion or that they will upset the data going from the pump to the paydesk monitor is not clear.
Several aircraft refuelling bowser operators restrict the use of Cell Phones whilst refuelling is in progress.
I know that Cell phones are powerful enough to upset GPS data.
And standby compasses.