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I could not imagine cell phone jammers would be מותר, but perhaps my gut-feeling is wrong...

Either way, I would be interested in knowing how they fit into halacha, and what the reasons behind forbidding [or permitting] their use would be. I would expect an answer to both cover the angle of how it affects an innocent user of a cellphone walking by, as well as the effect on the phone companies themselves.

Also of importance: would the location of the jammer (ie. whether in public or private domain) have an effect on the halacha?

I am specifically asking with regards to Jewish law, and without considering that they are in fact illegal by secular law (at least in the US).

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All these details.... It sounds like a full answer to this would be both long enough and complete enough to be a Journal of Halacha and Contemporary Society article. –  msh210 Sep 8 '11 at 22:46
why should it be asur? –  Shmuel Brin Sep 8 '11 at 23:06
I think every shul should have one and yeshiva for the Beis Medrash –  Chalutzhanal Sep 8 '11 at 23:34
@tom smith Well if Reuven is happily walking by talking to person Shimon, and the jammer is turned on, the conversation will hereby be dropped. Or better yet, Reuven is in shul and needs to call Hatzolah -- but there's no service!!! I can't think of a specific principle that would apply to this case, but cannot imaging it's perfectly okay –  yydl Sep 9 '11 at 1:36
Via Google, I discovered this brief, indicating that three [unnamed in the brief] rabbis signed a letter encouraging jamming in synagogues. Anyone know more about this? –  Isaac Moses Sep 13 '11 at 19:32

1 Answer 1

up vote 5 down vote accepted

Business Halacha Institute answered that it is prohibited to do so.

Their full quote:

Thank you for contacting us about this interesting matter. The answer to your inquiry is that it would indeed be prohibited for one to jam the signal so that others would not be able to use their cell phones. However, it is unlikely that the damaged parties would be able to collect anything from the “jammer.”

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