You have to be a little unlucky to make anything blow up
with a mobile phone...however, personal radio's and CB's
particularly those with illegal amps are potential hazards
in the context of filling the petrol tanks of either aircraft
or cars.
Typical mobile is generating up to 0.25W, while personal
radio / CB's might be 20-100 times stronger.
It was CB's which turned up to eleven would screw up
the electronics in automatic pump systems.
-- Andrew