Mobile phones have become an essential communication tool for us, and the demand for mobile signal blocking devices is gradually increasing. When we use a mobile phone for a call, we use the uplink frequency to contact the base station, and then the signal from the base station passes through the operator to achieve the call function in the phone. In standby mode, the phone still maintains contact with the base station through the uplink signal. Once there is a call demand, the phone can achieve call and information transmission functions through the operator at any time. And a frequency jammer is a device that interferes by sending the same signal frequency as this. If the phone shows no signal when using a frequency jammer, it is considered successful interference. Nowadays, with the increasing number of mobile phone users, it is inevitable that some places prohibit making calls, sending messages, and accessing the internet, and frequency interference machines have become very useful tools in these places.

Nowadays, frequency jammers can not only interfere with mobile phone signals, but also block GPS positioning signals, making their functions increasingly powerful. There are various types of shielding devices currently sold on the market, some of which can interfere with single ended signal frequencies, while others can simultaneously shield multiple signal frequency bands. The former has a single interference frequency band and more specialized shielding effect, while the latter has multiple types of interference signals and more complete shielding functions. You can select shielding devices that interfere with different frequency bands according to your needs.