How to block cell phone signal at work?

Hi, Hale
People who spend more time on their phones are more likely to rely on them, according to expert research. As a result, many people spend a lot of time browsing their mobile phone information at work. As a result, many business owners have chosen to build jamming systems in their office areas.
Business owners usually buy a few cell phone signal jammer. When the device is turned on, cell phone signals throughout the office area are blocked