If it is determined to be a telecom, you can check whether the network port can be unplugged, and then check whether the signal of the telecom mobile phone has weakened, and whether the mobile phone can access the Internet. If there is no change, probably Cell Phone Blocker Circuit Board . If there is a change, it is generally a home antenna for telecommunications. I think the latter is more likely. For operators, there is no need to interfere with other people, just make an appointment with the school and prevent other operators from entering the school to build the station. If you complain to the Radio Regulatory Commission about interference, you will be severely punished.
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