The police last week detected 160 mobile phones working inside the premises of the jail, located in Bhondsi village on the city's outskirts, using its cyber technology, Police Commissioner of Gurgaon Navdeep Singh Virk said.
It was identified that prisoners had access to most of the mobile phones, he said.
"This information was passed onto the jail authorities following which they conducted search operations and seized some phones and sim cards," the Commissioner said.