The widespread use of mobile phones has brought people a lot of convenience, but at the same time, there are also many problems. For example, mobile phones also bring many disadvantages. Because the students are still playing with their cell phones, which are loud, and there are trackers that track cell phone signals. It's important to avoid negative impacts and gain benefits, so sometimes you need to block cell phone signals, such as in classrooms, offices, conference rooms, and many other places. Cell phones should be kept away from noise.

　　Dozens of boxes filled with nearly 80,000 phone calls seized from prisoners in Oklahoma since 2010, Commerce Department officials told the outlet. They were taken to prison kitchens, thrown into fences, smuggled in during visits, and smuggled by unscrupulous correctional officers and prison staff. In 2016 alone, correctional officers removed a record-breaking nearly 9,000 cell phones.

　　They are bombarded with banned cell phones used to commit crimes in and out of prison. Thousands of cell phones enter Oklahoma prisons every year. Gangs use them to launch violent attacks outside prison walls. Drug dealers use them to intimidate witnesses or threaten discipline officers, while predators use them to talk to children.

　　Jamming technology that blocks cell phone signals exists in prisons, but federal law doesn't allow it. Instead, the FCC just studies after study. High-power multi-function cell phone jammer are popular globally because not only are people being interfered with by one device, but in many cases people feel that if they can identify the frequency band and range of interference, everything is perfect.

　　The Oklahoma Department of Corrections chief said he had traveled to Washington several times to try to persuade lawmakers to allow the use of jammers to intervene in prisons. The technology limits disruption to prisons without affecting homes and businesses.

　　"Most people don't live near prisons. Most of our facilities are in the countryside," Orbo said. "Even in Oklahoma, we've lost enough officers across the country because cell phones bring contraband. I want to end that."

　　In this booming technological era, users are more and more concerned about privacy and space, and with mobile travel, it becomes easier to communicate with each other, and users use their mobile phones to communicate. But there are also concerns about the threat posed by mobile phones. Therefore, it is absolutely necessary to introduce jammer gps to avoid the threat of mobile phones.