Question: Can the mobile phone signal jammer only interfere with the data and not the call?
Answer: It can be achieved, but it is more troublesome.
First, let’s see how to achieve it. The frequencies of 2G calls and data access are separated. It is necessary to conduct field surveys to distinguish the frequencies of 2G signals and 4G signals. Frequency adjustment is performed in each frequency segment, so as to realize the function of only shielding data from the Internet and retaining 2G calls.
Second, why is it troublesome? After on-site survey and adjustment of the frequency band of the cell phone jammer, the effect may appear at that time, but after a long time, the operator may adjust the frequency, and after the adjustment, the adjusted mobile phone signal at this time The shield is completely useless.