Last year, in a joint letter to Mumbai Metro, Bharti Airtel, Vodafone Idea, and Reliance Jio said it would not be possible to provide services at unviable rates offered by the third-party vendor appointed by the metro operator. Last year, in a joint letter to Mumbai Metro, Bharti Airtel, Vodafone Idea, and Reliance Jio said it would not be possible to provide services at unviable rates offered by the third-party vendor appointed by the metro operator. by Soban News (international And National News)