Bharti Airtel Chairman Sunil Mittal (L), India's Telecoms Minister Kapil Sibal (C) and Bharti Airtel's Chief executive for India and South Asia Sanjay Kapoor pose with a replica of a 4G USB stick during the launch of 4G services in Kolkata April 10, 2012. Bharti Airtel plans to launch its 4G services in Bangalore within 30 days, an executive said, after the country's largest mobile phone carrier launched the service in Kolkata earlier on Tuesday. Photo Credit: Indian Photo Agency