how do they block cell phone signals?

India
December 27, 2006 1:09pm CST
do they use any instrument?
5 responses
• India
15 Mar 07
Yes a device by the name of jammer is used to do so...... but i can't say how does it works
@myjeremy (48)
• Indonesia
15 Mar 07
yes, there is an instrument my wife is a teacher and every student in the school can't use their phone cell during the school hour..
27 Dec 06
i dont kno
@myjeremy (48)
• Indonesia
15 Mar 07
yes, there is an instrument my wife is a teacher and every student in the school can't use their phone cell during the school hour..
@socorban (650)
• United States
13 Mar 07
Frequency jammers. I have one, it sends out differant wave lengths of false signals corrupting any exicting signals in the area. Imagine you have your drop of water in a glass and you want it to get to the other side, now say i pour in a gallon of water, what happens to your drop? it gets lost in the mix, usually redirected.