The jamming device suppresses the mobile phone by sending signals at the same frequency and high enough power to make the two signals collide and cancel each other.The mobile phone is deceived into thinking that it has no service because it can only receive one of the frequencies.Some jammers only block one of the frequencies used by the phone, which has the effect of blocking two frequencies.To interfere with your phone, you only need a device that broadcasts at the correct…

If you carry a so-called GPS jammers with you, the GPS signal will be jammed, making GPS positioning impossible.All of these motives might also motivate the mobile smartphone to have a sign after the usage of the signal blocker.As long as the shielding range of the household signal shield can shield the children's…