After Pakistan installed new mobile phone towers along the 270 km border in Barmer despite objection from India, the administration has banned the use of Pakistani mobile SIM cards in the district.
The step comes after the issue was raised during the meeting of the Internal Security Committee recently.
Pakistani mobile phone network has a penetration of 30-40 km in Indian territory.
"This network penetration can be a threat to security as it can be used by smugglers or for any other anti-national activities," district collector Gaurav Goyal said.
He said that security agencies wanted the use of mobile SIMs from Pakistan to be declared an offence as it is not an easy task for them to track the calls made from such SIMs.
"Considering this apprehension of the agencies, we, using the powers under Cr.PC, declared the use of Pakistani SIMs in Barmer an offence," Goyal said.
Superintendent of Police Santosh Chalke said the network of Pakistani mobile companies has been traced in many villages along Barmer border starting from Gujrat frontier like Bhakhasar, Pipala, Krishna ka Tala, Janpalia, Kabul ki Dhani, Sajjan ka Par, Surte ki Dhani and Munabao.
"If any person uses the mobile SIM of Pakistan in these areas, we can not intercept such calls or monitor such conversation.
"The issue came up many times during discussions with security agencies and on the basis of these discussions, we requested the district administration to make the use of Pakistani SIMs in the region a punishable offence," he said.
The SP said this "will atleast discourage the use of such SIMs in Indian territory, if any".
During flag meetings, the BSF has registered its protest with Pakistan over installation of mobile towers along the border but it did not heed the requests and has recently increased the number of mobile towers along the border, said a BSF official.