The jammer will be used in the examination room. It will lead to poor network connection of residential buildings near the college entrance examination center. In addition to the signal amplifier that may be used for cheating in the exam, the signal shielding device temporarily turned on in the examination room will also affect the quality of the surrounding network.
If the mobile phone communication is abnormal on the day of the college entrance examination, it may be that the mobile phone is affected by the signal shielding device of the test center. If the mobile phone can't be used normally before and after the exam, please call the official customer service phone of each communication operator or consult the nearest business hall in time.
Extended data:
Mobile phone shielding works at a certain speed from the front end to the low frequency channel and then to the high scanning. The scanning speed will cause garbled interference to the information signal received by the mobile phone. The mobile phone can't detect the data normally sent by the base station and can't establish a connection with the base station. Mobile phone performance is used for network search, mobile phone has no signal, no service system and so on.
Basic functions:
1, slow start function
After the shield terminal is powered on, the power supply rises from zero to stability within 4 seconds.
2. Shielding function
After startup, the phones within range will be blocked within 35 seconds.