A phone and a SIM card were recovered on Monday from the inmate, identified as Bijan, alias Bijander, who is serving life term for a 1995 murder, a police spokesperson said.
However, when the accused was presented before District and Sessions judge on August 29, he denied that the seized mobile phone was his, the spokesperson said.
Meanwhile, the other inmates caught with mobile phones have been booked and police has launched a probe in the matter, he said.