"We are keen to augment the number of BTSes in both the circles to minimise call drops," Aircel regional business head (east) Virad Kaul told reporters here.

He said nearly 3,100 and 2,300 BTSes would be operational in RoB (Rest of Bengal) and Kolkata circles, respectively after additions to the existing infrastructure by December this year.

Kaul said Aircel would also roll out 4G services in RoB by December. He declined to comment about Kolkata circle where it does not hold 4G spectrum. Vodafone would launch the services from December in the circle along with Airtel which is already offering it.

Data traffic contributed 15 per cent to Aircel's overall revenue, which is projected to go up to 20 percent in the next few years. Growth in data traffic witnessed 300 percent rise in Kolkata and 250 percent in RoB circles, he said.

Meanwhile, Aircel yesterday launched a new data plan to get more traffic in its fold.