Quote:
Originally Posted by RyanH
There are very low-power jammers I've found to work perfectly just for this purpose. It creates a small bubble a few meters across that whacks any cell signal including 3G and texting. My wife's classroom has a hardline by her desk so emergency use isn't really an issue, including the fact there are two classrooms adjacent to her's with open doorways where when you pass that portal cell phones work fine. The best part is the look on the kids faces when they scrunch up at the screen noticing they get no cell connection in just that class. After a week or two they actually get used to it and don't bother looking at their phones. There are a few nasty abusers that this works perfectly for. Cool thing is - after a while they don't bother trying and then she can turn off the jammer until it starts becoming a problem again. Works like a charm.
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Dude, jamming cell signals is illegal except in hospitals and such in most states. Hopefully for your wife not in the one you live in.
I think you can understand how dangerous such devices would be in the hands of criminals who don't want their victims to be able to call for help.