(Telecompaper) Indian operator Bharti Airtel reported a continued increase in sales and profits for its fiscal second quarter, driven by strong demand for mobile data services. Revenues rose 4 percent year-on-year to INR 238.36 billion, and EBITDA was up 7 percent to INR 82.65 billion, helping the margin expand to 34.7 percent from 33.9 a year ago. Despite a doubling in financing costs, the sale of towers infrastructure helped the company still post a 10 percent rise in net profit to INR 15.23 billion. Capital expenditure jumped 35 percent to INR 50.34 billion on the expansion of 3G and 4G networks, leading to a 20 percent drop in operating cash flow to INR 32.31 billion.