what are the names of these devices?

[mutevaggil]

hi everybody.

i have a question. there are some kinds of devices don't let the cell phones work properly. they are used because of security problems at meetings, weddings, exhibitions etc...

i wanna learn about them. but, because of i dont know their names, i cant have googling. so do you know about it. At least a name for searching in the web?

thanks for reading.

bye.

 

[the_risk_master]

Hi mutevagil,

The keyword to that is "CELLULAR PHONE JAMMERS" or simply "GSM JAMMERS"

goodluck

 

[ivar4ever]

they are called cellular phone jammers.
but they are not legal in many countries.

Basic Principle is to transmit very high power signals in the same frequency band and prevent the proper reception of the intended signals by the device.

There was some discussion about this in the past. have a look at the following:

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[mutevaggil]

thanks to risk master and ivar4ever.

both helped me.

thanks again. goodbye