Airtel expects to add another 100 mn users

India's top mobile operator, Bharti Airtel Ltd, expects to add another 100 million users to its kitty in the coming years, chairman Sunil Mittal told a news conference in national capital New Delhi on Friday.Notably, 60 percent of the company's subscriber base is in the rural areas, which was once considered unviable. India has second-largest telecom user base in the world with 429.72 million telecom subscribers, both in the wireless and mobile segments.