sentences:  However, net profits dropped by 41% from US$470 million in 2009 to US$291 million 2010 due to a US$188 million increase in radio spectrum charges in India and an increase of US$106 million in debt interest.In 2010, Warid Telecom sold a majority 70.90% stake in the company to Bharti Airtel for US$300 million.The Bangladesh Telecommunication Regulatory Commission approved the deal on 4 January 2010.