When can cell phone signal jammer come in handy?
The main purpose of cell phone signal jammer is to turn off cell phones. Common bands follow 850 MHz, 900 MHz, 1800 MHz, 1900 MHz. But there are many smaller standards such as UMTS, CDMA2000, Nextel, TDMA, AMPS, W-CDMA PCS, etc.
How do GSM jammers work? Cell phone signal jammer blocks all signals mentioned above. These devices do not allow cell phones to receive or send mobile signals to the nearest mobile stations. Through this, one can block all signals in the jamming frequency and leave a phone without the ability to receive calls and send messages.
You can use a cell phone signal jammer, when you need to be silent. In addition, people use such jammers in libraries, theaters, cinemas where a silent condition must be observed.