Reliance Industries Limited (RIL) Chairman Mukesh Ambani on Sunday announced the launch of 4G services for all RIL employees under Reliance Jio, the telecom subsidiary of RIL. The commercial roll-out of Reliance Jio's services will reportedly begin in March-April. Telecom providers Bharti Airtel, Vodafone and Idea have already launched commercial 4G services in India.