App To Block Unwanted Cell Phone Calls
In addition to the above three types of App To Block Unwanted Cell Phone Calls available places, other areas such as gas stations, petrochemical plants, hospital outpatient clinics and other areas where phone calls are strictly prohibited, the installation of cell phone jammer , the effect is also very satisfactory. Fairness is only the fundamental rule of social development. There are many examinations needed in life, from elementary school to junior high school, junior high school to junior high school, and then to this year's college entrance examination, civil service recruitment and other national-level examinations. In order to better prevent students from cheating During the test, you must use mobile phone signal jammers and other methods to shield the signal in the test room from the mobile phone and the Internet that cannot communicate. You can also guard against student tricks if required.
Northeast Net Harbin, May 27th. Mobile phone signals extend in all directions, but calls at any time are sometimes annoying, not to mention important matters such as meetings and negotiations to avoid interference - so manufacturers seized business opportunities and started App To Block Unwanted Cell Phone Calls . In the face of this new product, the government functional department clearly announced that the product management department shall not produce, operate and use this frequency band without the allocation and approval of the use of this frequency band. The mobile phone signal jammer manufacturer's promotional materials say: This product mainly shields the frequency of the mobile phone to generate a shielded cut-off signal, which can successfully cut off the transmission and reception of mobile phone signals within a radius of 20 meters from the transmitting source. .It also has the functions of anti-eavesdropping, anti-static, fire-proof and explosion-proof.