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The US Federal Bureau of Prisons recently ran a test for jamming contraband cellphones in a South Carolina state correctional facility. “Micro-jamming,” or disrupting phone signals within a very precise area, was tested in a federal prison last year. But this test signaled that state prisons — which generally don’t have the authority to mess with phone signals — could be on their way to using the technology.
The test was held last week at the maximum-security Broad River Correctional Institution in Columbia, South Carolina. According to the Associated Press, it lasted five days and involved jamming signals in a housing unit. The National Telecommunications and Information Administration (NTIA), which oversaw the test, will analyze the…