Originally posted by: IGBT
..they're already here. small portable jobies you can run on batteries for local area jam. takes very little to jam out a cell phone.
The question is not whether they exist (they do), but whether they should be legal (in the US, they are not).
Originally posted by: her209
Isn't it against FCC rules?
Currently, yes. The FCC does not like any device that is intentionally designed to interfere with any other (lawful) device. They have shown some signs of waivering on this one, but I doubt they will.