In the present financial year, Bharti Airtel is investing 1 billion dollars (Rs.6,400 crore) to extend its 3G services across the India, expanding the network in new and existing circles to deploy data spectrum. According to a source, Airtel will roll out 3G networks aggressively over the first six months of this financial year as it has acquired additional 3G airwaves in many circles to plug coverage gaps. The company will take a call on injecting additional funds in 3G network expansion after getting a fix on whether the targeted revenue growth has been generated. During the company’s fourth-quarter earnings call, Gopal Vittal, Managing Director & CEO for India & South Asia, Bharti Airtel, had stated that while rolling out 3G networks, the company “would look at up fronting this capex in the first half” itself. According to a report released by UBS brokerage, the proportion of the mobile phone operator’s 3G sites increased to 33.3% of the total in the quarter ended March...