The FCC is working with corrections and public safety officials to fight against contraband cell phones in prisons. A meeting has been scheduled for next week at the agency, to consist of state and federal prison officials, as well as the Justice Department, South Carolina Corrections Director Bryan Stirling told the Associated Press.

Thousands of phones are confiscated each year from state and federal facilities. They’re smuggled in by visitors and employees, thrown over fences and even delivered by drone. Prison officials say inmates use the phones to commit crimes.

In the past, FCC Chairman Ajit Pai has said the Commission can’t permit jamming, citing a law that only allows federal officials to jam public airwaves, not state or localities. Wireless carriers argue that nearby signals, just outside the prison, could be affected. But Pai recently told members of Congress he would assemble a working group to address the public safety issue.

A recent jammer test at a federal prison in Cumberland, MD went well, according to Maryland Assistant Attorney General Beth Williams. She told the AP it differed from previous tests because jamming technology has evolved.

February 2, 2018