It is dangerous for a driver to watch a cell phone, and the use of a 4g phone jammer
is forced to stop. Mobile phones have become the playthings of many hands, whether it's mobile games or video entertainment, which is widely used. For the use of mobile phones, the mobile phone while driving is very dangerous, not only endanger their life safety, also can bring potential safety hazard to other traffic participants, especially the bus driver. Today, when I was taking the bus to work, I found that the bus driver looked at my mobile phone while driving, and I resolutely took out my cellphone signal jammer to stop it.