We all know that prison administration is a very difficult task: under the condition of a high concentration of modern mobile phones, prisons have gradually used signal jammer to shield mobile signals.
The NSW government could recommend receiving cell phones in prisons across the country after a court hearing in Lithgow Prison has been closed.
The convicted murderer Bassam Hamzy was arrested on a cell phone in 2008 to order kidnappings in Lithgow prison.
This led to the year-long cell phone jamming test that was completed this week.
During the trial, all of the cell phones from the Lithgow prison were unable to connect to a network due to dozens of antennas that generated a very weak signal.
The study included dozens of antennas installed in Lithgow Prison to produce a very weak signal that banished any cell phones that were connected to a network.
Because they contain very little metal, NSW Corrective Services said that cellphones are difficult to discover through other security measures, including random searches and screenings.
Reception interference was introduced in the United States and New Zealand.
The NSW government and Corrective Services will now evaluate the process and present their results to other states and territories.
The prison service says phone jamming will contribute to other anti-smuggling measures, including random searches and security screening.