That an "Intrinsically safe" phone would only be "required" in certain locations. Shouldn't this be a precaution that all devices should push towards? I know it's unlikely, but I have seen a spark come out of a cell phone and ignite gasoline. Maybe it takes 20 - 30 calls to a phone sitting next to gasoline for this to happen, but that 5% risk is unacceptable, as far as an Explosion is concerned. All devices should work towards being Intrinsically safe.
It's very easy to say "shouldn't everything be made to not be an ignition source", but it's not at all easy to actually make a product that is guaranteed to not be an ignition source under most circumstances.
An IS device has to be effectivley seal... (continues)