The thought of authorities shutting down the towers seems like it would do more harm than good. There would be a very slight chance of preventing a remote activation of a bomb, while there would be a 100% chance of hindering at least some emergency operations. Plus, the authorities would open themselves up for many expensive civil lawsuits for years to come. Lawyers would have a field day. There would be at least a few victims (maybe even dead victims) who would receive severely delayed medical care as a foreseeable result of not being able to communicate how the victims otherwise could have.
And you can send emails with text message too, best to know how your carrier handles this before hand.
Interesting, I only know about the other way around (sending text via email). I'll have to learn what you mentioned.
...easy, thanks.