Agree about illegal. But, sure would be da*n nice to have when we go to see a good movie, or to a nice restaurant for a nice, quiet dinner. If you happen to come across one that delivers an attention-getting electric shock to these idiots, though . . . huuummmmmmmm.

yeah could block cell based alarm systems too

i agree that some % of calls may be emergencies, and people should be able to respond to such emergencies. however anyone taking a call while in a theater or other public 'quiet' setting should have the courtesy to remove themselves. i didn't pay $12 to listen to someone on the phone. and considering you can hear 1/2 of everyone's cell conversation...it's not terribly difficult to gauge that who's sleeping over, what's for dinner, or who's dating who isn't life or death. and how in the world did we manage to deal with emergencies before instantaneous communications were possible?

GeorgiaBulldawg said:While you are playing around and having 'fun', someone may be trying to make an emergency call for help? Or maybe they are on the phone dealing with a family tragedy that is occurring at the very moment you are having 'fun'? Have you ever thought about that?

dupe post

Here's the deal. Unless you are willing to get several people's cell phones from different providers and tune this thing so that it Might block them, then don't waste ur time. I tried several people's settings I found on the web and could barely get it to block even one provider. The only way I could get it to block my Verizon phone was to have it 2 feet away or less, no matter what settings I tried. Also, keep in mind that by change settings I don't mean there,s a pretty digtal interface or anything like that. You have to actually open it up and use a screwdriver to manipulate 3 tiny analog screws. Just like trying to tune in a bad station on a very old tv. That's how you change the settings. So don't bother wasting your time and money.

GeorgiaBulldawg said:While you are playing around and having 'fun', someone may be trying to make an emergency call for help? Or maybe they are on the phone dealing with a family tragedy that is occurring at the very moment you are having 'fun'? Have you ever thought about that?

Or these devices could be used by criminals in commission of a crime to block someone from calling police.

drodgeNo, I'm not a lawyer. But I am an RF expert said:]]]]] who works for NSA and has 15 years of experience working with FCC compliance and I can assure you that despite not being lawyers, the posters here are 100% correct. All cell phones in the US work in licensed bands, and even possessing a device that can jam those frequencies is a felony. So is importing one, or using one.

Furthermore, this piece of crap has been posted here many times in the past. It didn't work then, and it doesn't work now. It's designed for foreign CDMA signals, which by definition are even harder to jam than our GSM networks. It also has a pathetic transmitter that won't work more than a few feet from a receiver. If you want to commit a felony in the process of flushing $47 down the toilet, go ahead. There are sites that claim you can mod this to jam US phones, but anyone who has those skills could build a better one on their own cheaper.

A $30 one from DealExtreme can block out the signal of AT&T 850/1900 GSM/3G and Verizon CDMA within about 10 feet for sure which I had hand-on experience with. So, if you don't have any hand-on experience with this devices, don't make your claim.

As a mobile software developer, it is a super-valuable tool for cell phone testing as many certifications require proper handling in losing and regaining signal. Rather than building a room to shield out the signal which a large company did where I had worked for (not counting travelling from other buildings to there, jammed with testers in a tiny room, signal is back and ruin the testing when someone opens the door...), it is much affordable for smaller developers. A few feet of range is perfect for this purpose.

Red not for the legal or moral aspects of this item. Red because the same thing at DX is a lot cheaper - so this is no deal at all. It is also yesterday's "deadly deal", not today's.

Dennis

From howstuffworks.com:

In the United States, cell-phone jamming is covered under the Communications Act of 1934, which prohibits people from "willfully or maliciously interfering with the radio communications of any station licensed or authorized" to operate. In fact, the "manufacture, importation, sale or offer for sale, including advertising, of devices designed to block or jam wireless transmissions is prohibited" as well.