This method has relatively high requirements on the mobile phone and the environment, but the effect is the best and the most hidden. The premise is that the mobile phone must have wifi wireless Internet access function, and there must be an available wireless network around. After searching for and successfully connecting to an available wireless network with your mobile phone, you can still surf the Internet even if your mobile phone has no signal or data. At this time, you can find the answer you can't find on Baidu. If you want to send an answer, you can play any platoon you want with qq. A super perverted approach. It is suitable for students who are not more than 50 meters away to pass answers to each other. You can also test two adjacent classrooms by yourself. Install bluetooth software like bluetooth hacker on your phone, then both sides turn on bluetooth visibility. In the software options, you can choose cell phone jammer to force blocking of bluetooth sending messages. Enter the answer and force it to send, all bluetooth phones with visible turn on will receive the answer, and one person will send it to the whole class to share. It should be emphasized that Cell Phone Blocker Pepper Shaker some models of mobile phones do not seem to be able to adjust the frequency.
You can change the network mode from automatic to manual, it will search for the network, don't select it if you find it, just return, and you will find that the signal is full in an instant. Of course, it also depends on the performance of the mobile phone. A one-second signal, but enough to send and receive text messages. Statistics show that there are about 120,000 gas stations in my country. Among them, there are about 52,000 "two barrels of oil" outlets, accounting for 46%. The remaining 68,000 include second-tier state-owned, foreign-funded and private chain and sporadic gas stations. In many areas, gas stations are large and mostly located in densely populated areas, so the safety management of gas stations is particularly important. Cell Phone Blocker Pepper Shaker Can greatly limit signal transmission.