Before adulthood, children often have poor self-control and are fascinated by mobile games. They spend too much time in the virtual world of mobile network, resulting in abandoned studies and gradual deterioration of family relations. Children's parents also racked their brains and tried all kinds of ways to organize to prevent such things from happening. Therefore, many parents want to interfere with the mobile phone signal at home by buying and using the mobile phone jammer, so that the mobile phone can not be connected to the Internet. They think that in this way, they can control the time for children to play games online through the mobile phone. Here, I solemnly warn all parents that this practice is not desirable.