Take the 2-minute tour ×  In my spare time, I am a volunteer for
the fire brigade. Yesterday I was attending a lessons about
preventing fires, and we saw a movie about a lady fueling her
car while receiving a call. And "boom"! The fuel, and later the
car, exploded because her cell phone got a call. The teacher
told us it was because her cell phone gave an electrical signal
(a kind of spark) and by so light up the whole place.  Since I
tend to carry my iPhone 4S in my pockets all the time, I'm
concerned about the risk of entering a building filled with some
gas. If I get a call when I'm in such a building, I'm afraid I
won't be around to answer the call anymore. :)  So, the teacher
told us there are special cell phones which are explosion proof.
These phones don't generate a spark or detectable electric
signal of any kind when receiving a call.  Is the iPhone 4S such
a cell phone? In other words, is it safe to carry an iPhone 4S
when entering a building filled with gas?  share|improve this
question I'd like to